Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e60109ca74dc845…

MALICIOUS

PDF

77.0 KB Created: 2021-04-06 04:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 974e41ffcb1d2015bd09b87d5b699050 SHA-1: 51f439e007a05e7dfa18ba06cfc92200a77caa77 SHA-256: 9e60109ca74dc845a974dbb073101769b4ce0837e2566f392018fe4a293c253f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://jottigo.ru/wix?keyword=teaching+textbooks+pre+algebra+answer+key+pdf PDF link annotation
    • http://leadtop.co/how_to_find_your_work_permit_number5u31n.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/GvYiapJ/alchemy_pot_pixel_dungeon.pdfIn PDF document text
    • https://cdn.sqhk.co/vomuvojovi/ijfKCjf/41785772465.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/eiceiiM/83077037225.pdfIn PDF document text
    • https://dojudetokin.weebly.com/uploads/1/3/4/6/134613144/3358151.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/iQhiick/xixevaxitimak.pdfIn PDF document text
    • https://tugofemupufere.weebly.com/uploads/1/3/4/5/134584107/vaxujoze.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/ahbvSji/negonowawutatiwuvumupabor.pdfIn PDF document text
    • https://cdn.sqhk.co/nadoranur/hegfhhY/five_nights_at_freddy_s_4_free_download.pdfIn PDF document text
    • http://trikotoria.ru/xogexatubexamatakidufru4.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/hjbSBac/endless_space_warp_drive.pdfIn PDF document text
    • https://cdn.sqhk.co/jibanukagexa/gigEt8i/i_love_you_priya_tamil_ringtone.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/dorimumikaros-buxokato-pemoresajeli.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/iehiicX/powoboledibud.pdfIn PDF document text
    • https://cdn.sqhk.co/kobedobofepo/mFfUhcb/77383976010.pdfIn PDF document text
    • https://nuvaxavixo.weebly.com/uploads/1/3/0/7/130738964/8556914.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/wizexee570a.pdfIn PDF document text
    • https://latifaxegorur.weebly.com/uploads/1/3/5/4/135400737/4481645.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/bojafazes/pugofigefutisunak.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/chennai_express_full_movie_720p_print.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2878198-ab73-45f5-bac0-bfdef3cff363/unabomber_manifesto_espaol_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4118dbdb-e03d-4ae3-84e1-22c0510f8dc3/xukamudosov.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_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 5832 bytes
SHA-256: 18cc490e0cbcf7c02868a27f1427cac789e037bd164639b79e25dd676685457c
font_01_sfnt_off0000ffd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD7 11404 bytes
SHA-256: 55b72ad117a798cddb26cfeb3bc2a4c637135d9e87efb2f4c5e291d0cdcb46ac

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