Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac361ba4a7f2a602…

MALICIOUS

PDF

75.4 KB Created: 2021-02-12 18:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 42cf2e2700a5f9ef8857d59715b7263c SHA-1: 4e4278d5efa331b23064aa29bfe8d4f22038968e SHA-256: ac361ba4a7f2a6024ff23386b63d21c4c2e62c5913c210c7e89317dc861f7fc7
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/123?utm_term=dual+long+leg+cast+stories In PDF document text
    • https://tolejavufagus.weebly.com/uploads/1/3/1/4/131437822/joxuwibor.pdfIn PDF document text
    • https://cdn.sqhk.co/momewoziwoge/JBgwbgg/guide_for_lesley_mobile_legends.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuguxovim/S4idY8H/can_you_find_your_facebook_friends_on_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/irjj8ij/10000280548.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474727/normal_60034a1522dec.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/etTN8je/warheads_super_sour_bubble_gum_pops_ingredients.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_602230ff73eb5.pdfIn PDF document text
    • https://cdn.sqhk.co/posibovifiw/ijighUK/guxasipamapagevidifogudul.pdfIn PDF document text
    • https://konilusikiwi.weebly.com/uploads/1/3/3/9/133986353/a0caa4d590b98.pdfIn PDF document text
    • http://jotodavusugiga.iblogger.org/dolawabupexodilulefom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491152/normal_6001aa4286298.pdfIn PDF document text
    • https://mavuzoxawajike.weebly.com/uploads/1/3/0/9/130969593/zevezavafibamog_jupovapadopo_davute_vawuk.pdfIn PDF document text
    • https://kijaxupujik.weebly.com/uploads/1/3/2/6/132695195/330281.pdfIn PDF document text
    • https://batigagonu.weebly.com/uploads/1/3/4/7/134774980/1881780.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402280/normal_5ff1996fe2d39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xifusejikudit.rf.gd/33771583809.pdfIn PDF document text
    • http://leliruwe.epizy.com/alcatel_lucent_phone_4019_manual.pdfIn PDF document text
    • http://pupovedifa.rf.gd/xazegivisigodib.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_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 4968 bytes
SHA-256: 7e04fd3230f635a5f983cb64a32b67d5e0a92681601a63a70d46eaa06f399a81
font_01_sfnt_off0000fc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3D 11032 bytes
SHA-256: ed566df8b4f4066263f8f8bd702ba89213f955993b0fe191800018216960011b

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