Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb4e0a88acff3ab…

MALICIOUS

PDF

67.2 KB Created: 2021-03-21 23:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 36f54ed6e36b4a7347d451533ccaa141 SHA-1: 8d38d6436f77fc0f9ebf3f9aeb1aa36b8ac52e45 SHA-256: 6eb4e0a88acff3abe41d02733f7ff078a78742099d71628af2036f22fcbf064f
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 0.9998

Heuristics 6

  • 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.
  • 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://crophysi.ru/wix?keyword=covalent+bonds+gizmo+answer+key+activity+a PDF link annotation
    • http://stassikorskyi.com/wexaneloserugekalamonca880.pdfIn PDF document text
    • https://cdn.sqhk.co/wareberefiz/6hbA2ie/worlds_hardest_game_4_speedrun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_5fd86227ba7ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_603822fe774f0.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/hjKByii/31867075935.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubokave/f2haqFV/49994801734.pdfIn PDF document text
    • https://cdn.sqhk.co/rurewemanavi/NPiyhee/oxygen_levels_while_sleeping_baby.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_5fd860f3cd340.pdfIn PDF document text
    • https://cdn.sqhk.co/nadokikado/ooiejcX/demon_slayer_rpg_2_script_v3rm.pdfIn PDF document text
    • http://metilukizitase.iblogger.org/45918626167.pdfIn PDF document text
    • http://afracheat3.xyz/x1_dvr_box_dimensionsefynw.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/YHaedGE/transformation_church_relationship_goals_podcast.pdfIn PDF document text
    • http://sunshop.pro/ardas_kara_punjabi_song_videos2vz5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kejidexod.epizy.com/dobonuxatokuxijojilumipo.pdfIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_e2eade13e2324332b9af70fa43773fce.pdf?index=trueIn PDF document text
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_e8e7a570d121481eb0e451bba5f737cf.pdf?index=trueIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_945fb48245474dccbae21d41d1c48661.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_off0000c87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87E 5672 bytes
SHA-256: acb2026ea22f76f711be3278cc880a172304716d9aab8d1555b4980af6dfc699
font_01_sfnt_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 10028 bytes
SHA-256: dd50bd0545ba87483fc28a85fa1bc0b74c2a807551f2729c515b2f172952edc9

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