Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b03c1b33a2d58a0…

MALICIOUS

PDF

73.8 KB Created: 2021-04-02 20:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 143ad630b4d7afd7abbccb06a1fb17f8 SHA-1: 7853fbb0a46ac7db218d977acbb06b0cfc897e36 SHA-256: 7b03c1b33a2d58a05c49a8a91739422f4f0d95bb5b5ba087f923fafdb129c13d
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 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.
  • 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://botokaw.ru/strik?utm_term=dell+vostro+1500+battery PDF link annotation
    • http://artrosil.xyz/what_walmart_is_open_24_hoursg3a3a.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/sapivet.pdfIn PDF document text
    • http://nanolenka.xyz/lee_child_make_me_book_reviewlqw1e.pdfIn PDF document text
    • http://govnosiakxws.online/smart_balance_oil_blend_smoke_pointaajdq.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/2001_jeep_grand_cherokee_limited_owners_manual.pdfIn PDF document text
    • http://xevozunufu.iblogger.org/ropowuretinobad.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/zarevizebi/bebo_bebo_song_pagalworld.pdfIn PDF document text
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_a0b09d6dfccb424ca61b32fbd2f16cd4.pdf?index=trueIn PDF document text
    • http://bubijijesaxo.epizy.com/ribumemugagulutal.pdfIn PDF document text
    • http://merapuw.epizy.com/mac_pages_training_manual_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23829232-57ff-48ed-ad2d-24f1daace2ad/11911378297.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/93312493456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f879e87a-6573-40cd-b04a-246a50f4b462/jotanokavedapexu.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/17429465539.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/vomab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30367a44-a714-4b3b-a161-d2f37e757393/ge_monogram_fridge_ice_maker_not_working.pdfIn PDF document text
    • http://zividovapajawuv.epizy.com/how_to_understand_executive_summary.pdfIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_7b62381a2f8148339c348d7f027c3e35.pdf?index=trueIn 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_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 5300 bytes
SHA-256: 6f5c7bf8795bea85a529ed59d1039c510b39a1c38b6340c2440f6c2bae008880
font_01_sfnt_off0000f3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B8 10880 bytes
SHA-256: 6ae54d027ed5b90ba99558f05c4e35316ccb894a8caa892f74c905dc86e8e1c4

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