Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7bbff467cb23c42…

MALICIOUS

PDF

96.9 KB Created: 2021-01-22 21:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1102af7ab5c3399e7c3b4ed9ba4f8e06 SHA-1: 18c9aa02aa136bb24396666a8b6f4cf68a80b63c SHA-256: e7bbff467cb23c4204c8caf7085cfc6d6742f6e4fa36a5401fabe7d62c83c7d7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV, flagging it as a phishing trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting it's designed to redirect users to malicious content. The presence of a link farm and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=stampy%2527s+lovely+world+2020+download PDF link annotation
    • https://cdn.sqhk.co/supesuvepo/dNTicjj/sad_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/9BidLO0/wadex.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/nihafOt/77929998778.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/gilow-rekotowevutum-fajomipizuva.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/2IhdhcZ/ninesekabasonubegesuf.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/SjdgRgg/immortal_raid_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/higjjTc/dipagijovijaduz.pdfIn PDF document text
    • https://fisadurubimu.weebly.com/uploads/1/3/1/4/131409264/vemenejogoparo_poxasirolarud_tujalakiwis_xetuw.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/jifigTn/83923536268.pdfIn PDF document text
    • https://vudexugir.weebly.com/uploads/1/3/2/7/132710723/5a4db85b013.pdfIn PDF document text
    • https://nebowepef.weebly.com/uploads/1/3/4/4/134483035/315814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484126/normal_5fe81647e3f87.pdfIn PDF document text
    • https://vidiwubiref.weebly.com/uploads/1/3/0/8/130874646/zusisep.pdfIn PDF document text
    • https://xivapumi.weebly.com/uploads/1/3/1/6/131606059/xetijazidefig-tijofuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369501/normal_600306b89fc70.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/jeH4poc/find_the_hidden_objects_printable_easy.pdfIn PDF document text
    • https://wewowalowumuv.weebly.com/uploads/1/3/4/0/134040384/tulum_xepomepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_5fdbde1e6f825.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/rixakel.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/relieving_letter_format_for_teacher.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/the_bachelors_movie_free.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_off00012a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A73 5512 bytes
SHA-256: 93fab407d107de8b8adc62cd5310c6df00f3217d2c1783a713f48644c9e82ad2
font_01_sfnt_off00013d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D36 12932 bytes
SHA-256: 88b790e88e37813e338aec0710e3f876639130771cd978f281500e0b7071758f
font_02_sfnt_off000167a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167A5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378