Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce75d5d78f058c5d…

MALICIOUS

PDF

77.1 KB Created: 2021-04-07 15:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 83757f26b5f4edc8a954383ceeb78fdc SHA-1: 75bffd6991c7c4724470e9bf4435c5d0b57d3dcf SHA-256: ce75d5d78f058c5d4bb5ecb0ba2c50190dba82268d3d7e4edd0f8e488c8a36a8
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, appears to be a lure related to career growth plans, designed to drive traffic to malicious or spam URLs. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://golowaki.ru/strik?utm_term=how+to+write+a+career+growth+plan PDF link annotation
    • https://cdn.sqhk.co/rijolumexeb/eF6gdge/cambrian_period_season_2.pdfIn PDF document text
    • https://fejegexe.weebly.com/uploads/1/3/4/6/134617501/d737a30f.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/ggiXFhb/3485674415.pdfIn PDF document text
    • https://cdn.sqhk.co/sozetojedisu/egggjjq/aviansies_guide_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/cejezt6/zusagadi.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/7Lgijg4/how_to_install_mods_on_minecraft_pe_2020.pdfIn PDF document text
    • https://mugibutu.weebly.com/uploads/1/3/4/7/134714928/30bb679ea57c.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/7271671.pdfIn PDF document text
    • https://manadazalivufud.weebly.com/uploads/1/3/4/3/134358645/xofijewafa.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/ySx2ihT/modern_sofa_design_with_price.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/dikobepibelun/aberto_sonorus_sony_android_tv.pdfIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_c17a4d0ae0d243738265de3f44717564.pdf?index=trueIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_00a60b6ae32246c182a748424b7d7511.pdf?index=trueIn PDF document text
    • http://vidojizo.rf.gd/ingenue_atoms_for_peace_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/weramejedalomivur.pdfIn PDF document text
    • http://safatagikev.rf.gd/kozixabutimis.pdfIn PDF document text
    • https://b9264059-5ce6-458a-812b-58b21e0c51d1.filesusr.com/ugd/9a3dc1_d2cde18b0e684a78bc5cf90c0610f2c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/gafagopele.pdfIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_974ef72b3c1540d5878ac28e8a81844c.pdf?index=trueIn PDF document text
    • http://gugoxoxopuza.epizy.com/nojamajaxem.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_off0000efe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 5072 bytes
SHA-256: f2166cfb484fbfbf77f5103806c0b1fffd9c7f333f21e5c75f4d0c3f1ac0f740
font_01_sfnt_off0001012f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012F 11092 bytes
SHA-256: e1ca334ad8c91075ab2eedca2f03f9698412d067e2fb1c746fc976b7c9fa9e29

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