Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ca477fee90f2af…

MALICIOUS

PDF

71.3 KB Created: 2020-11-19 04:44:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5550d1bed00466a5c9ee858e036af239 SHA-1: 18468f75e3a07faa00952a10a5c70b4ad952d73d SHA-256: a7ca477fee90f2afca4be8f1d692f75ea5f27a1a63ac0cd7dd95c4d4a5c4fdd9
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a heuristic indicating a link farm of external PDFs and a visual download button lure. The primary URL points to a resource related to downloading a hacked game, suggesting a phishing or malware distribution attempt.

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.
  • 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://traffset.ru/123?utm_term=hungry+shark+evolution+apk+download+hack PDF link annotation
    • https://sivivaleretuvu.weebly.com/uploads/1/3/4/3/134324596/5b703.pdfIn PDF document text
    • https://kozenuxifojani.weebly.com/uploads/1/3/4/6/134665776/a8be0c616.pdfIn PDF document text
    • https://rofinodaki.weebly.com/uploads/1/3/4/7/134721453/zuper.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/detobo_sanulinazenobig.pdfIn PDF document text
    • https://lepuzabokagat.weebly.com/uploads/1/3/4/3/134333079/9577412.pdfIn PDF document text
    • https://nulivoji.weebly.com/uploads/1/3/4/3/134343303/jofarixirezojo.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/mopuzagezu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/ca_final_new_books.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/91555039390.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/cara_kerja_obat_antasida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6888ef-2cd4-4123-8647-1ee511151a9d/guseguxivujudazuwaseve.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/10897592846.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/93490471695.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/megubatilusagube.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD739 5612 bytes
SHA-256: 1506bd9a87871e5de9dd5fa84a347d200eeeb888412f9edff2f5d2168070cb2a
font_01_sfnt_off0000ea68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 10496 bytes
SHA-256: 9896658adb351e7876298657a06fa4a71a74340527268710f41160c2a29843f2

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