Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4eb149ef13bfbe…

MALICIOUS

PDF

71.4 KB Created: 2021-03-01 04:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 4e52dc3c3aa0b6f9e124acf88e44d584 SHA-1: 9b4aa738eb2cc89a9d4ab9588c2d9e7b53a7aee3 SHA-256: 9f4eb149ef13bfbe13c51ee06ed6a7c69f8ef5866fd8c97b9ca7c52e45f46351
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://seumenha.ru/wix?keyword=atelier+meruru+trophy+guide', is presented in a way that suggests it is a guide, likely to trick users into visiting a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://seumenha.ru/wix?keyword=atelier+meruru+trophy+guide PDF link annotation
    • https://cdn.sqhk.co/nobipajami/ibhe8ge/lawexekakavaj.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/hbCidyB/15104020671.pdfIn PDF document text
    • https://lodofimedama.weebly.com/uploads/1/3/4/3/134327961/3605944.pdfIn PDF document text
    • https://fefoxotavom.weebly.com/uploads/1/3/5/3/135328849/1282063.pdfIn PDF document text
    • https://davokirik.weebly.com/uploads/1/3/0/7/130739121/nopedirod-zuxuzubazolutoz.pdfIn PDF document text
    • https://kawotubizon.weebly.com/uploads/1/3/1/8/131871780/lejozit_tegugujefotekow_tukaf_pozexolagufa.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/hbD4ijo/zelakufijam.pdfIn PDF document text
    • https://xikewipevugid.weebly.com/uploads/1/3/1/3/131383679/192e60add.pdfIn PDF document text
    • https://kemebawe.weebly.com/uploads/1/3/5/3/135313751/sawimowalubi_zamalajetil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bonezulaw.rf.gd/29881905894.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/571307313.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/47025549875.pdfIn PDF document text
    • http://tisigivikevutik.rf.gd/witabakuj.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/retatezuteduz.pdfIn PDF document text
    • http://wozinad.rf.gd/17745631974.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/8834434904.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/rinitafi.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_off0000db76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB76 5076 bytes
SHA-256: 78e76de76622ecdf6fcaa2307e490ad3e70e971c6533b4912488ee3e3ec33923
font_01_sfnt_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 10472 bytes
SHA-256: 95cace62f9793bed97af00f34bbbdccdda97f46b241665a360f4b4caef06ef49

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