Malicious PDF — malware analysis report

Static analysis result for SHA-256 7195cc4886f8ce9b…

MALICIOUS

PDF

71.0 KB Created: 2020-12-23 16:46:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ad99afee62992c33cb9f1efde7886449 SHA-1: 4920c68d6e6f93e91fc9422c9a284d1b3c5e3ae7 SHA-256: 7195cc4886f8ce9bf0d720ac5a683e88c7ab8a11154826d67209959c4d9e596b
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it's a phishing or scam document. It contains a significant number of external links, many of which point to SEO redirectors, suggesting an attempt to drive traffic to malicious sites. The document body, though heavily obfuscated, contains references to 'Facebook group cover size template' and 'wkhtmltopdf', likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafficel.ru/aws?utm_term=facebook+group+cover+size+template PDF link annotation
    • https://cdn.sqhk.co/fokivetezabu/RDHa7ZN/medieval_war_horse_crossword_clue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471095/normal_5fc3d0089aeb5.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwisagilevi/jhijg6u/59288154481.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/BFhbSdN/77923083507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_5fa0a7c6ab356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494877/normal_5fb8681404cdd.pdfIn PDF document text
    • https://cdn.sqhk.co/kefexunas/h4Zihia/56721682763.pdfIn PDF document text
    • https://cdn.sqhk.co/wotezowedo/DKIheaA/nudapugajefobefevitoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5fad9db8db2b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452377/normal_5fc20ae77a239.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479213/normal_5fcd4175ad067.pdfIn PDF document text
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/3e19812dd.pdfIn PDF document text
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/fazewuxiwonob-webibasesevot-dojef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/mamekuwavapudamem.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/drill_stand_guide_screwfix.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/47155114013.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEF 5300 bytes
SHA-256: fe39d82c65fb99811ba28ebb14a8b4af297f79cf12915d8ca41a37052a75d42f
font_01_sfnt_off0000dd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0C 10548 bytes
SHA-256: fd1c7b062704b6b3168a216a6146d43692e6a34264bdc68d1bd5646f32e30905
font_02_sfnt_off00010106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10106 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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