Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd068a2600eb5a4a…

MALICIOUS

PDF

85.0 KB Created: 2021-09-13 20:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e4617471c59c6ba0d2f0e3e919389891 SHA-1: 1e40158d5a63431ef2d1f4d69172746f3621f809 SHA-256: dd068a2600eb5a4ac749a80b5ba30b674dac2bb16bf77c642fdf95bb228c92ba
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the presence of numerous external links and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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 http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75811430225.pdf In PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/75223905117.pdfIn PDF document text
    • http://ocean-ex.com/images/blog/file/netaxev.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/bbk7iu822gedq1hbc6kgc13lp7/62677431369.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369ea4868f5---sajebupilowadow.pdfIn PDF document text
    • https://ivanamihic.com/files/dajub.pdfIn PDF document text
    • http://premo.at/userfiles/file/76201065175.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/34754515632.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/e49226f30ceebe8b77ff96111b916e1a/94313816423.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/4549197192.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/kilusonunuvijariwofuforo.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/212129957.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/57772418653.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/nisuxifil.pdfIn PDF document text
    • https://el-tall.pl/pics/file/94994803955.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/97369653677.pdfIn PDF document text
    • https://digireg.es/upload/xinetedake.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/deraguwubezenefogasujip.pdfIn PDF document text
    • https://fleseriuassociates.ro/files/file/getatodiwazojejeda.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/mezivuzobikosupip.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/9afba4b9ce28574a17bec6b1de05c24c/laparakavoboji.pdfIn PDF document text
    • http://www.toptehnik.si/images/nasuxefebezokivujeruw.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ed4781aeb---dijagizesub.pdfIn PDF document text
    • https://gdaniec.com/upload/files/kugobidifo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=android+vs+ios+programmingPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE738 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4F 10508 bytes
SHA-256: 25b255cd70f56cd06fbb62a4b395c52e21d349b783014425c16fde2498dc1505
font_02_sfnt_off000116f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F6 18380 bytes
SHA-256: 4c9286a2862faf4805c89ff994bcb6ee07e6f504e89c6c78dc040cff732278a2

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