Malicious PDF — malware analysis report

Static analysis result for SHA-256 76102ba165f87535…

MALICIOUS

PDF

76.3 KB Created: 2021-02-25 20:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 876476013a07cfed24203e54751bba95 SHA-1: 954850475c09fa4baeb902076c578bba30c7a946 SHA-256: 76102ba165f87535192c1ea17fc37c88e0e799b0a4c249cccd85b5151409708b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://maypoin.ru/strik?utm_term=how+to+download+a+music+for+free PDF link annotation
    • http://wejowadizabudex.mypressonline.com/mental_endurance_synonym.pdfIn PDF document text
    • https://daluxetito.weebly.com/uploads/1/3/5/3/135344689/f4647265ed92c16.pdfIn PDF document text
    • http://sodobinefudiguw.iblogger.org/airtel_tv_apk_for_fire_stick.pdfIn PDF document text
    • https://vefutafefu.weebly.com/uploads/1/3/4/8/134882527/7981295.pdfIn PDF document text
    • http://uchebnoe.website/dbt_therapy_tipsnt9ek.pdfIn PDF document text
    • https://batapasupo.weebly.com/uploads/1/3/1/4/131482803/marorinej.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/71959721734.pdfIn PDF document text
    • http://zesizejo.22web.org/dave_ramsey_financial_advisor_training.pdfIn PDF document text
    • http://nuzenupezebep.iblogger.org/kasopibobowasaxawiv.pdfIn PDF document text
    • http://zasijeg.iblogger.org/65776800042.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
    • http://mewuxugeje.epizy.com/60946884453.pdfIn PDF document text
    • http://belinoremujuk.rf.gd/77165954146.pdfIn PDF document text
    • http://fusatepalu.epizy.com/ikea_hack_platform_bed_with_drawers.pdfIn PDF document text
    • http://wijegasijewen.rf.gd/jalefefunodum.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/oedipus_rex_movie_2008_trailer.pdfIn PDF document text
    • http://pebitezilewabe.rf.gd/the_man_without_qualities_vol_2.pdfIn PDF document text
    • http://vaxalisuj.rf.gd/always_and_forever_lara_jean_audiobook.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_off0000e1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AA 5104 bytes
SHA-256: dd5fda8733517b18685a327acfc5815c6dacdaf462320aec1395ada821fcdbd5
font_01_sfnt_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 10108 bytes
SHA-256: a7142dd08919e07a1418861a44aadc62baeb3155c47620a74f4cddbff03b1fd9
font_02_sfnt_off000115a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176