Malicious PDF — malware analysis report

Static analysis result for SHA-256 317169b163d5e663…

MALICIOUS

PDF

71.3 KB Created: 2021-04-06 15:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0fc360514a753467131b074110d48896 SHA-1: 4b41c414fff499ab88f885720f79feed76ec8732 SHA-256: 317169b163d5e6630fdedd7a662aeef71c909f83a90ead5e00acb7430ac452fd
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing attempt. It contains numerous external links, many hosted on disposable domains, designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam.

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
  • 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://dugedepap.ru/aws?utm_term=whirlpool+quiet+partner+1+reset+codes PDF link annotation
    • https://cdn.sqhk.co/sozivowemin/g69idja/fageramepefot.pdfIn PDF document text
    • https://cdn.sqhk.co/xasurila/icqhfGx/glyburide_and_metformin_hydrochloride_tablets_usp.pdfIn PDF document text
    • https://majijajivetik.weebly.com/uploads/1/3/4/2/134265766/fitam.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/xhgcgg2/59425848201.pdfIn PDF document text
    • https://ziduxaxeg.weebly.com/uploads/1/3/1/3/131380546/7740461.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/0af781.pdfIn PDF document text
    • https://gokidobizivoji.weebly.com/uploads/1/3/4/4/134495246/nepijimigimute.pdfIn PDF document text
    • https://jawemojope.weebly.com/uploads/1/3/4/3/134399256/kavojuwulinibivera.pdfIn PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/sugogerev_sitanenatu.pdfIn PDF document text
    • https://cdn.sqhk.co/bijowiroma/gij6hbk/linokeluwukosavokodom.pdfIn PDF document text
    • https://xubivolimoba.weebly.com/uploads/1/3/0/7/130740090/feguvuji-zujadelog.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/kanijinedufujig.pdfIn PDF document text
    • http://praktika-ingenieur.com/60203050811garku.pdfIn PDF document text
    • https://nidexopike.weebly.com/uploads/1/3/1/4/131407316/vubobofim.pdfIn PDF document text
    • http://test123test.xyz/tovirij4vgvb.pdfIn PDF document text
    • https://jejofiwapo.weebly.com/uploads/1/3/5/3/135312812/466574ae6ca7b2.pdfIn PDF document text
    • https://kewesolatuveg.weebly.com/uploads/1/3/1/4/131452958/luxilotiziz.pdfIn PDF document text
    • https://rotaxavevun.weebly.com/uploads/1/3/4/8/134884867/9326760.pdfIn PDF document text
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/wupedef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc25ed7-0aca-4c3b-8ae7-c5194b477fa8/35538342484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7bbf6dc-1141-4d73-8138-b50233e7b81e/best_short_stories_collection_goodreads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aaa3b1a-ca77-4987-8575-bd6dc84653a8/jixigagovozekagixato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbaae089-24b5-41c6-bacb-2924f5fbda62/gisodogawizajisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b81aa2f-92da-4189-82cb-1b43e96a1461/memrias_pstumas_de_brs_cubas_baixar.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_off0000d8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B2 5352 bytes
SHA-256: 76a0f060e69976651ddc83c474b4d153441fffb5060c2efb324121f6fde22749
font_01_sfnt_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 10656 bytes
SHA-256: 4a0c5dd50a7c0a55ce3feabe3e99c5c5fa08e99a091c98dc729c25519892bcbd