Malicious PDF — malware analysis report

Static analysis result for SHA-256 247e78b78c35ee6f…

MALICIOUS

PDF

135.6 KB Created: 2021-06-08 19:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 740b8f7615543f505338312cdf3f15a6 SHA-1: 80bf7728be6e40f102a0eee90a3b5dda2640d56b SHA-256: 247e78b78c35ee6f3ac43edfbe654ed5f2fdf5e99ff6b8fdc04d70b77f89a2d6
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document exhibits multiple indicators of malicious intent, including a high ML score and ClamAV detection as a phishing trojan. It employs social engineering lures such as a fake download button, a QR code redirect, and a remote support tool pretext, all designed to trick the user into downloading a malicious payload. The numerous embedded URLs pointing to compromised CMS uploads and disposable hosting further support a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://coretry.ru/uplcv?utm_term=pambu+panchangam+2019 PDF link annotation
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f457fd4071---63581818311.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/36179251535.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/10rvr7epoa4sose7u3fdvpcap4/tadifo.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/q3gp83vsrsokbuhu2bcklu8pjr/85929786146.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/zujitogamoperolobosemapob.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985e4b15874---jaxixudob.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160994956a79fa---mivajuwujemewenupafoxa.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0be8a37b7---dumama.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/36431551074.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/e53b77vsonmlvch19jpn3i0ag5/ronubogod.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/d095070d0d8d62509a90998a37e4d364/seguxol.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/ec1de413c1d112be2899acf2c0f60d63/4563717820.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/gokikaboseden.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/3prmngd0q9bghlpot25tl8ndhg/misikizeluxoduj.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bac1f3ad1a0---83399338513.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001754c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1754C 8748 bytes
SHA-256: b7def7f273b804d156e39851c451c3eeec48d70ce8b4eaa79a59f37c19d206ac
font_01_sfnt_off000192dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192DC 5664 bytes
SHA-256: 5e97d2648675c52fcf43364ca417c44ae22d1e53ff520d972796c6f80f82a675
font_02_sfnt_off0001a601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A601 8568 bytes
SHA-256: abe5612ece675ef4e859e1fdfce617d7913aa20581923dec7230d343ac406b26
font_03_sfnt_off0001bd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD88 20060 bytes
SHA-256: 231318c39203184029a482556ca13de6b53a8762b6ab738e72ba509e3105fbdb
font_04_sfnt_off0001f939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F939 16576 bytes
SHA-256: ff0b0e2f7bfb0c4ef3a64fa46ec939be0629452da926f86e36105e08e3b010bb

Open this report in the interactive analyzer, or submit your own file for analysis.