Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e287a3b18f7f580…

MALICIOUS

PDF

76.0 KB Created: 2021-03-03 07:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 77244623c596d93692275b6a75996f9f SHA-1: d29cccc8c6f9956fdffa11e8c67790dd317950c1 SHA-256: 1e287a3b18f7f5809eaee0e499d91aeb4de62066bc13d52af59b6a3dfda27929
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, with one heuristic identifying it as a PDF SEO link farm. The primary malicious URL is fokemale.ru, which is likely used to distribute further payloads or redirect users to phishing sites. No scripts were extracted, but the presence of numerous external links and the phishing detection strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://fokemale.ru/strik?utm_term=toto+toilet+replacement+parts+handle PDF link annotation
    • http://xitabijasava.getenjoyment.net/white_fang_1991_full_movie_free.pdfIn PDF document text
    • https://nojoxarojip.weebly.com/uploads/1/3/0/8/130813855/fozomad-fuxojovijinev.pdfIn PDF document text
    • https://cdn.sqhk.co/rinovizifim/qgihfmR/16636689685.pdfIn PDF document text
    • https://saniruguroxi.weebly.com/uploads/1/3/4/5/134585545/c846128d5e.pdfIn PDF document text
    • https://muxiduxipa.weebly.com/uploads/1/3/5/3/135319221/db4ea490d06ef.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/xukanomarexumu/velorojarujugid.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/notakosovukutefiromoka.pdfIn PDF document text
    • http://soxomidil.epizy.com/possessive_adjectives_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/34914180046.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/satyanarayana_biochemistry_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/56184020072.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/meme_generator_app_apk.pdfIn PDF document text
    • http://segoxegigo.epizy.com/altered_state_of_consciousness.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/85403867776.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/allahabad_university_degree_online_form.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_off0000ebad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 5260 bytes
SHA-256: 052798495fa7a9d5c632b56d17685791597037fe1bf76d8874f535b4be1171be
font_01_sfnt_off0000fd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 10912 bytes
SHA-256: edb4b2242ecb247297bfe70fdadf7db7679ad35fb87cdc2a373989dd855bf152

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