Malicious PDF — malware analysis report

Static analysis result for SHA-256 914de42c9ec03cd0…

MALICIOUS

PDF

78.2 KB Created: 2021-03-18 06:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 01f072f452dacb2ae61ebdc9f6df4c6a SHA-1: eb8562bf5b88b6a6e638d0bb7dbbd8c13f1d8ee0 SHA-256: 914de42c9ec03cd064d13beac312bf3da0468ee27d9203ba5b067f834ab71d5c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wix?keyword=nms+farming+guide PDF link annotation
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/20f23246340300.pdfIn PDF document text
    • https://pafodezeba.weebly.com/uploads/1/3/4/5/134589846/pirosekura.pdfIn PDF document text
    • https://cdn.sqhk.co/merisipugito/Ngfjahb/92785871545.pdfIn PDF document text
    • https://kamojadatuxam.weebly.com/uploads/1/3/5/3/135316538/liridefutebi_vevup.pdfIn PDF document text
    • https://nigipesifagezeb.weebly.com/uploads/1/3/1/4/131411762/8511864.pdfIn PDF document text
    • https://lurofigugibax.weebly.com/uploads/1/3/4/6/134686006/8345399.pdfIn PDF document text
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/051fa.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/sesun_xojidujavugu_fuvige.pdfIn PDF document text
    • https://wexewuvaxodewo.weebly.com/uploads/1/3/1/4/131407465/50d425377ab9.pdfIn PDF document text
    • https://cdn.sqhk.co/wigalefu/ajeg3Ji/rechargeable_digital_hearing_aid_reviews.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/9d51f8d9d0ac148.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/gjjiPbT/top_islamic_ringtones_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/NEif4PM/pagozo.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/bisakesewib_wefuzesuxes_vejiganovotafax.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/a4cWT8d/galaxy_war_game_free_download_for_pc.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/gavijasiw-rosojejelowov-besijipe-gibame.pdfIn PDF document text
    • https://donasidavojixa.weebly.com/uploads/1/3/4/4/134494786/6502028.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/wiremeresegikon/motito.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/what_is_the_salary_of_nasa_scientist_in_indian_rupees.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/sobumefiputuvezo.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/80770525058.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/albumin_administration_guidelines.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_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 5164 bytes
SHA-256: ae4630b1d37efa394efc32a30598b981fb7985835ca3926dc9d0759240b30904
font_01_sfnt_off00010672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10672 10884 bytes
SHA-256: a2d1873c30284bdaf9e7e66429003686573218a785cf72e2aa98343d0d62718e