Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9e7c07b9935d16…

MALICIOUS

PDF

99.1 KB Created: 2020-11-13 02:12:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2cbefd98d71ead7ecf69b3df4ddba24c SHA-1: bbad9c13442a11ece083b6e6546d08b00ebd0ecb SHA-256: 8d9e7c07b9935d165c1d36d0608ea3ba9f806aefe1bab4bbd6eb0c7f5adf7fb7
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded links suggests an attempt to direct users to external malicious sites, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/123?utm_term=vb+mapp+scoring+supplement In PDF document text
    • https://wozagadukuwa.weebly.com/uploads/1/3/4/4/134483903/kufururak_xofefeneguta.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/5146662.pdfIn PDF document text
    • https://wopufibirebosaw.weebly.com/uploads/1/3/4/4/134466277/gugaw-zepus-jojupe-fetakuneva.pdfIn PDF document text
    • https://gitijekukojijot.weebly.com/uploads/1/3/4/6/134626905/betitewa.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/pibutigejapejowade.pdfIn PDF document text
    • https://kezaguwubov.weebly.com/uploads/1/3/4/6/134632481/2001876.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb13fba-f37d-4e9f-80ad-64ba387a49e4/56647967613.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/39236658766.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/zenopelob.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/10136897204.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/yalla_koora_live.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/live_and_let_live_aa.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/coulomb_s_law_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90b9409-27e3-4e81-9e2d-5f360ab10c1d/verudadeno.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_off0001478f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1478F 5356 bytes
SHA-256: b752647501ffca023109e6472ac55b1483eb0b70eda325bbfe5587544c6b878c
font_01_sfnt_off000159ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159AE 11332 bytes
SHA-256: 2bff1609d580d96ace101d418a54bc8afbbb99ad4c7b3e183cb9e76a91880d18

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