Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a9f9a777b03d79…

MALICIOUS

PDF

68.4 KB Created: 2020-12-23 10:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 43f023b254f666f7e0f9e5eab3058505 SHA-1: 92cc07b933c5e6cedb78672107886c19f16399ea SHA-256: a1a9f9a777b03d796e56c9288be75f73377dbe2185e064172edbefb33fd76f9d
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The document body, though partially corrupted, contains text related to game downloads, suggesting a lure. The presence of multiple Weebly-hosted PDF files indicates a link farm designed to distribute malicious content or phish 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=kick+the+buddy+game+download+for+android In PDF document text
    • https://gupamawuma.weebly.com/uploads/1/3/4/6/134602371/nojega-roxekuj-jumupor-rijaguregotog.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/4685109.pdfIn PDF document text
    • https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/3968638.pdfIn PDF document text
    • https://miposuxabok.weebly.com/uploads/1/3/4/7/134765548/4112dd13e210.pdfIn PDF document text
    • https://lupuxamugegudi.weebly.com/uploads/1/3/4/6/134623484/lupubukumijusa.pdfIn PDF document text
    • https://divugukapo.weebly.com/uploads/1/3/4/7/134706398/tijenodepebota.pdfIn PDF document text
    • https://sukorajonivo.weebly.com/uploads/1/3/4/1/134108587/kobadisomeg_muxisa_gikugokejiw.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/funife.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/retisovojor/79777762963.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/69717216407.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/bin_sachivalay_model_paper_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/7698839112.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/informatii_despre_columna_lui_traian_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/mimopurud.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/minecraft_apk_1._14._3.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_off0000cf9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9C 5624 bytes
SHA-256: ca3c96eae765adc9872911faa6a662991d5b9d0c2c26e1fdb4c686766dac898c
font_01_sfnt_off0000e2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B2 9780 bytes
SHA-256: a6e399f52f829542829203a8998618853b67b9fbfc64061b2ca9ce819c4a55b0

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