Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fcaaa026b29cca0…

MALICIOUS

PDF

83.1 KB Created: 2021-03-13 17:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b0789f41f613ef2c6caa71e9d32e931b SHA-1: b09755ccd0fba099d1aacf305f82f565085a8f42 SHA-256: 7fcaaa026b29cca0ad05d3351003270b6c3d5987d232611b236d4994a7bbfe56
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/aws?utm_term=xerox+workcentre+7545+fax+setup PDF link annotation
    • http://xuforaxi.22web.org/67027866943.pdfIn PDF document text
    • https://cdn.sqhk.co/gesuxafom/jeMNuAc/takeout_restaurants_open_by_me_now.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/igLPru3/24499568674.pdfIn PDF document text
    • https://nabesoke.weebly.com/uploads/1/3/4/0/134042749/5162045.pdfIn PDF document text
    • https://zulasiromeg.weebly.com/uploads/1/3/1/4/131453934/kaditiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482206/normal_602ee4d3a9977.pdfIn PDF document text
    • http://prizinsta.online/altronix_al400ulacmz1bdk.pdfIn PDF document text
    • http://vatasefapulik.iblogger.org/84386776385.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/2657136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_603a972f9d2cb.pdfIn PDF document text
    • https://toxobeveja.weebly.com/uploads/1/3/1/4/131437160/4918128.pdfIn PDF document text
    • https://cdn.sqhk.co/bujomuvi/iehgjbw/karuppasamy_audio_songs_free.pdfIn PDF document text
    • http://c-advance.space/xixatupisuxorafto929.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376854/normal_5fef4f00a0a3a.pdfIn PDF document text
    • http://online-sistem.site/21819225796akcab.pdfIn PDF document text
    • http://mivetys.xyz/casio_aq-s810w_pricey3pj5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5fd6e2b061fc9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mosupixozijet.epizy.com/argon_18_gallium_pro_size_guide.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_5d3cc75ae3374a20bb05231a237744c7.pdf?index=trueIn PDF document text
    • http://kedumojuri.rf.gd/moraweragosijefupomof.pdfIn PDF document text
    • http://batijobiso.epizy.com/20957840606.pdfIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_0667f36522f24a19a55b4d4dbec9e85c.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_025b38cb658b49d59991a194ddcb9ec7.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_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 5472 bytes
SHA-256: 11e04ca48325ebced06c4d16d7d45c3ccedf9cccb058e1c724b303c80cac5841
font_01_sfnt_off000116a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A6 11828 bytes
SHA-256: 947df29ece9afd3bf66e34b2c99254423f7bdd7f84db535ce8b0b5ca8415ba1d

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