Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afb92b2ccde8cb2…

MALICIOUS

PDF

78.2 KB Created: 2021-03-30 18:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6b486407d11ba4e76c60e0ae2604e712 SHA-1: 252ca9d1d7421e918204622f55f00c70e63944ed SHA-256: 1afb92b2ccde8cb2042575e8ffc6cbfbd84175b81e5070e3776396ae067e558c
202 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, containing a large number of external links, many hosted on disposable domains. The document body, though heavily obfuscated, suggests a pretext of providing a 'food list' to entice users to click on these links. The presence of ML and ClamAV detections further supports its malicious classification, likely serving as a dropper or redirector to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/strik?utm_term=hcg+2.0+food+list+pdf PDF link annotation
    • http://nosinoski.shop/infiniti_q50_answer_back_exterior_light8krzw.pdfIn PDF document text
    • https://xadafujivesa.weebly.com/uploads/1/3/1/3/131397927/32123f8f7.pdfIn PDF document text
    • https://vipofobusaxipol.weebly.com/uploads/1/3/4/2/134234766/143465.pdfIn PDF document text
    • http://unityfree.xyz/how_to_become_a_certified_cdl_instructork381s.pdfIn PDF document text
    • http://ranupila.mywebcommunity.org/how_to_write_a_estimate_proposal.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/how_to_afford_rent_in_california.pdfIn PDF document text
    • https://bovitala.weebly.com/uploads/1/3/4/4/134497817/zoromaxidunene.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/international_marketing_group_complaints.pdfIn PDF document text
    • http://ifeelgood.club/excel_bedingte_formatierung_leere_zelle_ignorierenttr3e.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/xapafigoxozu.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/juwunawojuvixitivano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e2a12503-e9f4-4898-9b1e-00959bf5a9c8.filesusr.com/ugd/1f0de7_eb3ba2a030fb4b7e92c6c6a8d0c19f5b.pdf?index=trueIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_fce53f584bd14375ae07b4912c36af0c.pdf?index=trueIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_766bcb7df2534026a812d7f6f0e89b87.pdf?index=trueIn PDF document text
    • http://tupesom.atwebpages.com/big_orange_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/tizeruxelovujel.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/niranenifizezikejuli.pdfIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_a75700ffa4c9429190f571ffe9f65f3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/star_wars_canon_novels_reading_order.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_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 5284 bytes
SHA-256: 9439f9bc91da0ebbf1fec7156716c2de239b8384d5bbef4cf3158d733f3a60b8
font_01_sfnt_off0000fc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC11 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 10948 bytes
SHA-256: 01860801c43141dfd0f843081fb2690a72618f194da23c246c3912764194ae48

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