Malicious PDF — malware analysis report

Static analysis result for SHA-256 862a71b47c7bebcb…

MALICIOUS

PDF

82.1 KB Created: 2021-09-02 12:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 450de46856dfc31658872175f9e3aca6 SHA-1: 8391c0c43fd07c4c104b94d8edd798b0590f4dee SHA-256: 862a71b47c7bebcbee12ea5be0b0d937e1cfaafd39e44aa0ab33ff655f5c39bf
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple domains, some of which appear to be compromised WordPress sites or disposable hosting, suggesting a phishing or scam campaign. The embedded URLs are designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=katalon+studio+tutorial+espa%C3%B1ol+pdf PDF link annotation
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/005e57e2e55fb26a5a13b46ef9817c0f/78912822222.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/xevidumu.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/vitejakavejumoxigu.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/mevomozabe.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098677f534cc---93218076028.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/0dfd894402a20aff3270fdb0e679b3a5/dobagejunidofapikasafurer.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b68d4217c---mutitazozada.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/towanovemaridu.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/bolakusijugu.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/13039811291.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160cf91616e878---tekugubijixozeso.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/nelifokogetalapomava.pdfIn PDF document text
    • https://dm288.com/slicice/file/68248069772.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/binekivimituwune.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/derigikufanowuguke.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40f7ba43c4---saran.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/f9769a270f1282f7aa34e0d481760ec8/busuguzoxibozo.pdfIn PDF document text
    • http://01host.ru/userfiles/files/pexozetakinuzawixomen.pdfIn PDF document text
    • http://phutungvespaco.com/luutru/files/72978704751.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/343852ccca5d4ef889c0067571f4ebb5/dirisapeganibuwisodivel.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/zajaxazesurag.pdfIn PDF document text
    • http://hopkinshigh1966.com/clients/1/10/1054c114374c88b4a165e91103565d41/File/78968462616.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/bivajizigewuwefujevu.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/sewasubapagifasodow.pdfIn 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://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_off0000d67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE92 10788 bytes
SHA-256: b52bec4093cd60c8334c4d8d19549b63787916fb39b0da5ede7006e8a80c800f
font_02_sfnt_off0001074c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074C 18928 bytes
SHA-256: d915b02f7007f5f8eaedbfe2daf62d8c81cc382ac22713921d7fd79a45db4791

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