Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbd40333087e161…

MALICIOUS

PDF

87.7 KB Created: 2021-05-13 11:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fb774ee0694f74633c3f509669153def SHA-1: e27466d5a36b78fbef45291182b34043b572690c SHA-256: 5cbd40333087e161118ee741d55456dcb64390bcc287073bc1a2430c14a07691
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, including critical alerts for malicious redirector links and a link farm on disposable hosting. The document contains a large number of embedded URLs, many of which point to disposable domains or redirectors, suggesting a phishing or scam campaign. The presence of embedded URLs and the nature of the heuristics strongly indicate an attempt to direct users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=how+to+run+python+code+from+visual+studio+code In PDF document text
    • http://kijekidajefi.getenjoyment.net/aesthetics_in_art.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/QyJ9bif/spades_plus_free_coins_hack.pdfIn PDF document text
    • https://muzufuwuvul.weebly.com/uploads/1/3/2/3/132302955/3023883.pdfIn PDF document text
    • http://fawanajaxape.22web.org/pisonemijixe.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/xikuvarukijemore.pdfIn PDF document text
    • https://biziremidawa.weebly.com/uploads/1/3/5/3/135397591/843325.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/hhjdhid/43068504625.pdfIn PDF document text
    • https://cdn.sqhk.co/betarudigi/hVyrjcF/wigatunafiluxadawegiju.pdfIn PDF document text
    • https://depagolal.weebly.com/uploads/1/3/0/8/130813973/623dd58e2f26.pdfIn PDF document text
    • https://cdn.sqhk.co/sejarepezibo/ChjfieO/samurai_2k_usa_inc.pdfIn PDF document text
    • https://sovokuragul.weebly.com/uploads/1/3/2/8/132814371/juvabedex.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/gcn5Pjj/war_1944_world_war_ii_dates.pdfIn PDF document text
    • http://bivisurat.22web.org/tidefunagonoju.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/aff798.pdfIn PDF document text
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/a688317ebf603.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gijisavapazixi.rf.gd/worksheet_13_using_parallel_structure.pdfIn PDF document text
    • http://sumekumamefos.epizy.com/bsc_magazine_september_2020.pdfIn PDF document text
    • http://gujalitez.epizy.com/discomfort_is_the_price_of_admission_to_a_meaningful_life_meaning.pdfIn PDF document text
    • http://xijejuvi.myartsonline.com/asphalt_pavement_design.pdfIn PDF document text
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_7ad2747a96334d90bef5439a9b93b8d6.pdf?index=trueIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_8304cbc868214f00883686847409d164.pdf?index=trueIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_950fe57b78e54537b8a3f355030663d9.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10308 5608 bytes
SHA-256: 81fcee01188c55d955ae192ac59ade07669199bbca1ac07a5c72bdd969db5613
font_01_sfnt_off0001160e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160E 10660 bytes
SHA-256: 6f550eb41aafcbc5ba80f6478d8df500c40c2ed34fb64761c5f2fa6158308523
font_02_sfnt_off00013aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AED 16516 bytes
SHA-256: f973753998894d04a9f0e090e4674c070442aa14f79289f6f96ce91618ff347c

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