Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c67b2d84555aac…

MALICIOUS

PDF

86.4 KB Created: 2021-04-19 11:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3a48f31e87bb35f21574a969c6c5f7d7 SHA-1: 1014d72e743f9d0b4aa5090541fb49cebe7adda3 SHA-256: 64c67b2d84555aac97d64ba9764e951acf77416604dfac8aad7dab450b255f0d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, characteristic of a link farm used for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or exploiting vulnerabilities via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=sony+dcr+sx65e+price+in+pakistan PDF link annotation
    • http://ratixopawem.mypressonline.com/cancer_espinocelular.pdfIn PDF document text
    • https://gawofatofuwe.weebly.com/uploads/1/3/1/3/131380275/noxanima_belolowifiwum_wuzipetukor.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/2065671.pdfIn PDF document text
    • https://numixojuxijeb.weebly.com/uploads/1/3/4/6/134604084/302612.pdfIn PDF document text
    • https://puxodemidumez.weebly.com/uploads/1/3/5/3/135345879/727092.pdfIn PDF document text
    • https://ranalugepileli.weebly.com/uploads/1/3/4/7/134735155/8dfa53f.pdfIn PDF document text
    • https://mejekuveko.weebly.com/uploads/1/3/5/3/135392268/dutapawojowiwid.pdfIn PDF document text
    • http://pixizosusonaxij.sportsontheweb.net/database_functions_in_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_6039815b6732b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408471/normal_603eacca4ae96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://larovitivejel.atwebpages.com/15786364478.pdfIn PDF document text
    • http://kititone.epizy.com/bitlocker_for_windows_8._1_filehippo.pdfIn PDF document text
    • http://nakimot.epizy.com/37909759563.pdfIn PDF document text
    • http://gasigigi.rf.gd/mejaxow.pdfIn PDF document text
    • http://jugofave.rf.gd/google_calendar_sync_settings_android.pdfIn PDF document text
    • http://jimanujomubil.epizy.com/aafp_isfm_feline_friendly_handling_guidelines.pdfIn PDF document text
    • http://wukerakowevomu.epizy.com/41543383386.pdfIn PDF document text
    • http://bubomixutiw.rf.gd/sapilavarowadob.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA78 3100 bytes
SHA-256: 6edd27726782c8691b795eeca94f184ec33f4c397cf312a49ef49a99f90ff6b5
font_01_sfnt_off00010580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10580 5436 bytes
SHA-256: 67e50f9062f903008bb1a984b02aa118dbd20ccbd2d7c3aa4b1b425c6338535d
font_02_sfnt_off0001180a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180A 11044 bytes
SHA-256: 1eacfadc388c261e2e75c70122f376995261e19006ba628b6f80eac6d18d5b68
font_03_sfnt_off00013de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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