Malicious PDF — malware analysis report

Static analysis result for SHA-256 06981bce2dbf7d2d…

MALICIOUS

PDF

71.2 KB Created: 2021-03-22 14:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b92b9d89d1cf47c14389d8ffcf2dbfcc SHA-1: ccfddb93dd937847043e6f6cea38f9919fc8f6fa SHA-256: 06981bce2dbf7d2d0b8c577bfee8f7c62b1e5f722645bb29662884c78149f42f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation scheme. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the nature of the link farm suggest an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/123?utm_term=i-+10+traffic+report+tallahassee+fl PDF link annotation
    • http://ig-copyrighthelpcenter.com/suwurujupiasxxr.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/jiijjhi/53637266753.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/jcghpjd/praise_and_worship_songs_chords_guitar.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/jCvElhf/pm_awas_yojana_form_rajasthan.pdfIn PDF document text
    • https://cdn.sqhk.co/rutesawir/gho97Mw/jevus.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/gfegjhd/78159200879.pdfIn PDF document text
    • http://airet.space/96350856593j6zp6.pdfIn PDF document text
    • https://cdn.sqhk.co/kujufemom/aheVehf/zegufosalupu.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/hhRogjJ/sports_apparel_brands_logos.pdfIn PDF document text
    • https://burakatotofok.weebly.com/uploads/1/3/1/8/131871829/4c2dee.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/oSm0Id4/antibiotic_resistance_research_paper.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/lojakebexapeka_zabuwegupeg.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/iajijgd/wisezijaxapunuguri.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/hjemjim/46563341016.pdfIn PDF document text
    • http://discovljzg.fun/23302742109st6tb.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/hejaMk2/top_5_tik_tok_ringtone_2019_download.pdfIn PDF document text
    • http://ogranicbio.fun/are_there_fake_nixon_watchesovspu.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/jVljjja/26890884801.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/xiwevitox/52295547640.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/takojipexibisarewoda.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/pukovudizajuzib.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/salojarofukuvovavaxes.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_off0000d940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD940 5264 bytes
SHA-256: b56892c22d2490fdd9e8093b4cdd84b3a40b47d56322272a51ea24034979be47
font_01_sfnt_off0000eb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2E 10612 bytes
SHA-256: 8935d161995e1ea589511f394a42e71d08bf7c79f88bd95a667a8d3c2c82f1fb

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