Malicious PDF — malware analysis report

Static analysis result for SHA-256 085d6cc2e4ec2da3…

MALICIOUS

PDF

79.6 KB Created: 2021-03-18 23:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7f72bf85bfd8105559aa6ba0abc595da SHA-1: 81754c2f7165d3d01410fcf9bacead84242b51c2 SHA-256: 085d6cc2e4ec2da3bad9f128724d3ce6e926239cdc00a16fc83bd981a9fe8305
186 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. 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 0.9996

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://ponafet.ru/strik?utm_term=mr+coffee+coffee+maker+reviews PDF link annotation
    • http://leree4.club/vemuveyyjf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477379/normal_600d8ce1c7b87.pdfIn PDF document text
    • http://toxusuzom.mypressonline.com/ejemplos_de_alcance_de_un_proyecto.pdfIn PDF document text
    • https://bemuzulezevateb.weebly.com/uploads/1/3/4/4/134440878/70620bbbd82502.pdfIn PDF document text
    • http://azakalaza5.xyz/2011_chevy_traverse_enginematb9.pdfIn PDF document text
    • http://trysucre.pro/78509598933tiykk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_60209b0d4c429.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/nemefatepoto_wutopi_dabubovi.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/how_to_turn_on_taranis_qx7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_601739079ba19.pdfIn PDF document text
    • http://bcipreactivaperu.com/sea_bream_fish_baitv7xyi.pdfIn PDF document text
    • http://wobixoka.66ghz.com/craftsman_6.75_lawn_mower_22_inch_manual.pdfIn PDF document text
    • https://nafuxiba.weebly.com/uploads/1/3/4/0/134097784/padewadaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383146/normal_5fdc536774c87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_600e2449ea9c6.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/969193ff-6563-4997-94d8-0f614747d546/how_to_become_a_sane_rn_in_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78f6175-5638-4c51-b610-bf35ec5a9e07/79774254217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d50b92f-dc10-41cc-925b-5f36b23bd1a6/ford_mustang_ecoboost_engine_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277034b9-02c4-453a-86e4-f3b2f29ef023/sadalevevaditadibodoxu.pdfIn PDF document text
    • http://kovejenipo.epizy.com/whatsapp_for_nokia_5233_s60.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1070359-9514-46cf-a588-6bd3d76298d1/jemiduve.pdfIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/77475886597.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_off0000f930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF930 5216 bytes
SHA-256: 5b5ad5aa4cd5048c9fe809133a633c0123133b6086266c66f2221546f320c455
font_01_sfnt_off00010afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFC 10608 bytes
SHA-256: e6ca3c42236b5e8a586e541e73cdf5b994d856d225b7396588ecf58fa8a6c836

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