Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7cbf9499f1701b7…

MALICIOUS

PDF

116.7 KB Created: 2021-03-18 21:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 91513cdf2b8410e138f63fbdbc74c72c SHA-1: 11363de6a2168eef3cd68fa4a9a47740c019659b SHA-256: b7cbf9499f1701b7122fff6305540521fff2036dbc9ad16979c43d7377dcab4f
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm and potential phishing lure, as indicated by numerous external URLs pointing to disposable hosting services. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/wix?keyword=manual+taotronics+tt-ba01 PDF link annotation
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/lajinepepuz.pdfIn PDF document text
    • https://zedemozotazodi.weebly.com/uploads/1/3/0/7/130776451/luzutijometo.pdfIn PDF document text
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/c81ff41fb0e94e.pdfIn PDF document text
    • http://myimperfectmomlife.com/nerexegevokunome3495.pdfIn PDF document text
    • https://vetolotex.weebly.com/uploads/1/3/1/3/131379132/6901803.pdfIn PDF document text
    • https://sumejuloluguwir.weebly.com/uploads/1/3/5/3/135390827/8435226.pdfIn PDF document text
    • https://cdn.sqhk.co/vatepasoxi/jejgiiX/badovaxixuxapinilol.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/partitura_amparito_roca29c8e.pdfIn PDF document text
    • https://cdn.sqhk.co/xaleteser/jedXhbD/87544083268.pdfIn PDF document text
    • https://wexivupesowapab.weebly.com/uploads/1/3/2/7/132712225/6178483.pdfIn PDF document text
    • https://lukibufipijuzom.weebly.com/uploads/1/3/3/9/133997252/xesevizakoxojovoxib.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/d0Hnhf2/word_farm_cross_daily_answers.pdfIn PDF document text
    • http://blacklaser.ru/lord_of_the_flies_island_symbolism_quotesayhs7.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/wobamuxisad.pdfIn PDF document text
    • http://sibogufurab.medianewsonline.com/maternity_leave_letter.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/id3ZheL/42194966146.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/5702874541.pdfIn PDF document text
    • http://fastpysystem.online/titulos_de_credito_definicion_doctrinalapdyv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopefunexot.epizy.com/devil_hunt_pc_game.pdfIn PDF document text
    • http://vudatuvabejosix.epizy.com/13335486730.pdfIn PDF document text
    • http://rolavamaget.rf.gd/laledolowuvinafilimikami.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_off00018671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18671 5164 bytes
SHA-256: cc51af66bc34249249f33eb6276f7b3982d6a21f0a989aa38a0c6087f41633aa
font_01_sfnt_off00019821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19821 13248 bytes
SHA-256: 7439a9765f4101bb949accb275fd74f8555ec8f09d21d6fd5fd984e76ea3d3a7

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