Malicious PDF — malware analysis report

Static analysis result for SHA-256 97771f6b2b113fc4…

MALICIOUS

PDF

79.3 KB Created: 2020-11-19 17:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: deb0a51c2fa33fe0e6bde6132909345b SHA-1: 1e3a43adcb1f76fce95382b95cbc08af74333841 SHA-256: 97771f6b2b113fc41d6a686fcd4fde1557759b983ef59f60e9c0eea1e44d4680
244 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to a 'Texas drivers license manual in Spanish'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous external links also points to a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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/123?utm_term=texas+drivers+license+manual+in+spanish In PDF document text
    • https://vigejudekoseja.weebly.com/uploads/1/3/4/5/134518300/wodifuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5f8a92bd4b0ff.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/cb0a75df4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450243/normal_5fb47d1fc1b24.pdfIn PDF document text
    • https://kepelawurolunuz.weebly.com/uploads/1/3/4/0/134017158/1982161.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/juzejam-fanax-notamumimizaki.pdfIn PDF document text
    • https://lepitosamodovax.weebly.com/uploads/1/3/4/3/134335454/kixemaxomadajetagaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f87097f7c780.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/98c1aad3-c602-495f-aba7-cb26d300d870/introduction_to_mathematical_programming_winston.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/74955919351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfb69bc-e162-4575-92ff-b47c75e3de1c/zomilewidut.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/potholes_state_park_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/bizagi_3._0_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f267386e-8a56-4444-84bf-d6e6092b6aca/tatajenitixabulavoxonoja.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_off0000fa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 5388 bytes
SHA-256: cfb839778a156a203bcd494858bd7e639ec6a2e59446229f047525484df03d5d
font_01_sfnt_off00010c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5E 10488 bytes
SHA-256: 6ec31b6d1f4ca82485df6c86a4ebb38c016cf66b9092380cd5bfae920fca1934

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