Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a1e531bb11f93e…

MALICIOUS

PDF

76.6 KB Created: 2021-05-09 08:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4d46e169a8aed4ebfef93c694cf73828 SHA-1: 19887759ffeabe4091b45b02453b2a41d16bda7c SHA-256: 68a1e531bb11f93e4e3cf7ca4c375ec249875725a0956c5b72c95b235e0e1142
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

Heuristics 5

  • 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 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://jumiwimov.ru/strik?utm_term=autocad+electrical+2020+software+free+download PDF link annotation
    • http://idealica-italiaufficiale.website/watering_can_templatewx5t7.pdfIn PDF document text
    • https://satepiwe.weebly.com/uploads/1/3/5/3/135350267/9ef81d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418764/normal_5ff8480c955c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_6022925aad33c.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/jhichdb/gelexukupegezuralanujapi.pdfIn PDF document text
    • http://koteyarn.moscow/how_to_connect_soundbar_to_a_lg_tv1st9f.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/jhhghbu/bloons_td_5_hack_apk_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470679/normal_606411814ff62.pdfIn PDF document text
    • https://zonozedu.weebly.com/uploads/1/3/0/8/130874021/6548064.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/wuzuboranus.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepiwedo/injbghS/45937162334.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413462/normal_5ff207e76eb0b.pdfIn PDF document text
    • http://optamorem.com/wufasezoselateek8mc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467017/normal_5fec3fba878ab.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/rhhugeS/moruti.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/genedonapubefe/application_form_to_renew_us_passport.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81da940d-5bb2-4529-bcbc-18c87dc90ef9/como_ser_un_buen_lider_en_el_trabajo.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/desh_bhakti_song_free_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc66f844-282e-4bdd-a33d-8471cfbafa86/romutebos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f88cf6-c55a-4599-8bd4-043816584eb3/kizelaxigakijabobo.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_off0000eaa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 5372 bytes
SHA-256: f7bcaad9fb15407d3c922f48b1feb272ac9f88251b0977d5dc950f3877af0626
font_01_sfnt_off0000fd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD08 11660 bytes
SHA-256: 5ec763bec99e15b8a19a1cdcbfae031f885c5b4228e0162ec464475383fe271d

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