Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa233313c7e35fba…

MALICIOUS

PDF

74.9 KB Created: 2020-11-25 06:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8fd8d0dc92f5dce92ed0815c7d29e710 SHA-1: 06baabd3fd4e4d7174aeab4a00bcef407469a7c6 SHA-256: fa233313c7e35fbaeb614c5390a8a3e8b45e22406c0aeaa39c9a041079edbdd3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF URI heuristic pointing to 'traffnew.ru' and a 'PDF_SEO_LINK_FARM' heuristic with numerous external links suggests the document's primary purpose is to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or SEO spam 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
  • 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://traffnew.ru/aws?utm_term=java+windows+xp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403807/normal_5fbd5c1eddeec.pdfIn PDF document text
    • https://pugujexavifik.weebly.com/uploads/1/3/4/7/134702512/9684612.pdfIn PDF document text
    • https://jubezotezuwu.weebly.com/uploads/1/3/4/4/134476040/sizedaso-nabafezorofisa-rilum.pdfIn PDF document text
    • https://tupekado.weebly.com/uploads/1/3/4/5/134514551/ratopozewamutezeseta.pdfIn PDF document text
    • https://vuxidozeni.weebly.com/uploads/1/3/4/6/134669409/4499609.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/rijusovuwemaz_dezozize.pdfIn PDF document text
    • https://vuvonuzomuvi.weebly.com/uploads/1/3/4/5/134508102/pikopuzekivufe.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/mexavofezoxi/10097927330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0142c2f4-3ebd-4010-8aeb-3d32dd6c4a6c/73570794398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c7295d-05c6-4620-b03e-988d6c1cfb4d/green_finch_and_linnet_bird_sweeney.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/6068955255.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/jizamuse.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/76983996791.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/65643982559.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_off0000e77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 5032 bytes
SHA-256: 11df9ba588cfe7b15c5013c417c32af1a886d83d2cb0c9c131e3bcfc6ddcf816
font_01_sfnt_off0000f8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CD 11200 bytes
SHA-256: eded0836315f568968413f77b4a967049a39729e7a38494acb5bfaaf2b4c268e

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