Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0912162cfa776ee…

MALICIOUS

PDF

78.0 KB Created: 2021-01-26 03:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fd2dff6a477d586b9655c21af9f090c4 SHA-1: 76823c81ce4a8e57304ac979926eb995b680bf72 SHA-256: a0912162cfa776ee3c22f45f2fac23a9c30d4832d1d725912ffab6c5f0681764
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a malicious link distribution campaign.

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://traffking.ru/123?utm_term=purple+party+politics In PDF document text
    • https://jasudelile.weebly.com/uploads/1/3/4/0/134012727/vewiposavudaperiwil.pdfIn PDF document text
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/wafizeregi.pdfIn PDF document text
    • https://sotivozorome.weebly.com/uploads/1/3/4/7/134733800/vukudog.pdfIn PDF document text
    • http://proba7.xyz/55952322549ckdp5.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/hd0jhaf/tusifirifelep.pdfIn PDF document text
    • https://cdn.sqhk.co/fokodusi/jfhbpg6/tegutofow.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/pileridanedobipiva.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/remeranexe/54579150487.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/atm_full_form_in_agriculture.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/falobemuraderik.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/blush_emoji_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/ribudizigosoxevotopik.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04A 5028 bytes
SHA-256: 8c4f1e121981ccff2bf517301df7d3f1501474b3c0b955efe3611c8b4bcb13db
font_01_sfnt_off0000f176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF176 10820 bytes
SHA-256: d1ebb861157c505e021bb20f5a7ed348e657895b2281f031c041e3866e502633
font_02_sfnt_off000115e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E9 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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