Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a3472a2beae121…

MALICIOUS

PDF

69.8 KB Created: 2021-02-18 08:19:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a74644adebe9195f4cc4ef75aba1fad5 SHA-1: a826da7351d8efdf4587b13bb8db666d6c479576 SHA-256: 04a3472a2beae1214d88f3b88aabad1701fb2c5a60c4334074cc4d693cc2a3ae
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, indicating a link farm or SEO manipulation tactic. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification returned a high probability of maliciousness. The embedded links likely serve to distribute further malicious content or lead users to phishing sites.

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://bologen.ru/strik?utm_term=every+heart+a+doorway+pdf+download PDF link annotation
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/693203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469634/normal_5fce5878a48d1.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/rijhihd/zombie_shooter_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_6022cbb5a9590.pdfIn PDF document text
    • http://xinorigevidemo.iblogger.org/17954901082.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/geTIlii/31314394378.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/bixakejoginut-lapul.pdfIn PDF document text
    • https://cdn.sqhk.co/pawijilabu/hfPhaMe/domino_pizza_deals_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/xubodijixali/a0hevAd/libunulologavojudiboxeru.pdfIn PDF document text
    • https://cdn.sqhk.co/dagedazi/vghanih/enemy_strike_3_apk.pdfIn PDF document text
    • http://cryogen.me/27ud58-_b_reviewy5zn2.pdfIn PDF document text
    • http://bajelow.iblogger.org/kynar_740_sheet.pdfIn PDF document text
    • https://kerobasoxegetun.weebly.com/uploads/1/3/4/0/134017970/124577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_600dd79490966.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/moduluzuxikari/geriw.pdfIn PDF document text
    • http://mutidulofof.epizy.com/figomiriwujelujuguvuw.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_off0000d349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD349 5164 bytes
SHA-256: 742fc922eb7081ff67434633c0c931bd65719f2b9f1b28ee807520eecec75a7c
font_01_sfnt_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 10768 bytes
SHA-256: d22447963d09ba73ae740812245abb6e5c6cca2b11947d9bef0f165298ae8d81

Open this report in the interactive analyzer, or submit your own file for analysis.