Malicious PDF — malware analysis report

Static analysis result for SHA-256 02314f6591c30eb7…

MALICIOUS

PDF

87.7 KB Created: 2021-09-04 11:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 73b7be4777bea831c530e3ad40f645cc SHA-1: 3c03d394e6358e7ab1e0db4a6111196e2f1114e5 SHA-256: 02314f6591c30eb79b70aa0290332988fcfd6de034105ab0a873e4c1d9319669
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. The presence of numerous links pointing to compromised or disposable hosting, identified as a link farm, suggests an attempt to redirect users to malicious sites. The document body is unreadable, but the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://blv.by/upload/editor/files/raxenuwowusotujiliza.pdf In PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/2fbcac60a6b1398d27aa3f0462d4f0cf/55447540315.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/05994c8757580b66278d1d7f105d8d0d/gudefo.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/63163299235.pdfIn PDF document text
    • https://zahnersatz.pl/userfiles/files/66288247695.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c75464d9c3f---19155171731.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/rogujavezululoxijoduf.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25502c770a---84117830963.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/pagopovajifetupuw.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/85410769171.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ce82da9f0---85156301774.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d54722cf3fb---tatatumubabafisofero.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757dcde8f3e---51875818922.pdfIn PDF document text
    • http://effektfilm.de/files/file/nujitubasonulaxi.pdfIn PDF document text
    • http://wami.cc/data/files/9944026080.pdfIn PDF document text
    • http://contelex.it/userfiles/files/305859720.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7e6d55f98ea84f217971f1ed47c0f766/pusesalumanumawode.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/95873528561.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/80648123636.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/93694359936.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=disney+hollywood+studios+park+map+pdfPDF 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_off0000f0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B3 18132 bytes
SHA-256: 054a77c9f849295773ae60fb127f8d4c8c831741c5de57ba6ff471c5e5153f9e
font_02_sfnt_off000137ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AB 11156 bytes
SHA-256: a2cb7b067e79c60626f12d999eebe6bba836ed585e6e1680d25c8f9a7c0824d0

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