Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f4e6e5bab19575…

MALICIOUS

PDF

84.7 KB Created: 2021-02-13 15:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dcb67ed2b06e1077947b87e3d13d52b5 SHA-1: 6c487dc7f2a8f571150d90bb43a401b0b3fc4d21 SHA-256: 96f4e6e5bab1957533dc7f4f46174da4f4ad6f1e85517c79e9af406bd029f01b
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains like Weebly, suggesting a link farm or SEO manipulation tactic. The primary purpose appears to be redirecting users to potentially malicious or scam-related websites.

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://seumenha.ru/wb?keyword=geranyl%20formate%20goodscents PDF link annotation
    • https://sibotapitagota.weebly.com/uploads/1/3/4/3/134378411/03e57ed70baf39.pdfIn PDF document text
    • https://zikixitifo.weebly.com/uploads/1/3/4/8/134897390/dumogudijozagaloji.pdfIn PDF document text
    • https://roturusuwanowus.weebly.com/uploads/1/3/4/3/134363773/00cc8be8bf266.pdfIn PDF document text
    • http://ubsvp.com/raxiretabifokoxufejif9eeq.pdfIn PDF document text
    • https://revininone.weebly.com/uploads/1/3/1/3/131380081/votifoxibezosus_mililig.pdfIn PDF document text
    • http://mastera-saydinga.ru/converting_between_fractions_decimals_and_percents_worksheetbgxcc.pdfIn PDF document text
    • https://davufafelasipip.weebly.com/uploads/1/3/4/3/134328138/1950261.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477630/normal_5fe3a40b3344b.pdfIn PDF document text
    • https://pewaruraxifazof.weebly.com/uploads/1/3/4/3/134340131/xiwazepu.pdfIn PDF document text
    • https://titezexi.weebly.com/uploads/1/3/4/6/134639754/vavixufe_wuwevon.pdfIn PDF document text
    • http://ericksandoval.com/shahrukh_khan_movie_website1n8p1.pdfIn PDF document text
    • https://xoduwotef.weebly.com/uploads/1/3/5/3/135328954/xumusok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464083/normal_5ff04bcec9089.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiwafejopof.epizy.com/event_timeline_html_template.pdfIn PDF document text
    • http://xafamikipu.epizy.com/46186805864.pdfIn PDF document text
    • http://jegapedobip.epizy.com/nibopumokiwulotezumarud.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_off00010c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6A 5476 bytes
SHA-256: e13c677053d90bbdb6c4bdc476b81cdb6ad31cf789ff83a2c2d31afc678e64d2
font_01_sfnt_off00011f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F01 11672 bytes
SHA-256: a21a9290e7efe04f8c2cf98231803ab482b122b30bd95920b15c78f24452df44

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