Malicious PDF — malware analysis report

Static analysis result for SHA-256 9593c2fb7c9ca72c…

MALICIOUS

PDF

79.9 KB Created: 2021-01-29 01:29:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5f139cd6d379176c84e5330cfb432813 SHA-1: 1302d25452aee66e1823df75bed7c5c8c1c9dd51 SHA-256: 9593c2fb7c9ca72cc6ef983f546ddf7a955fc783dac73428e1440ae551a89c7a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links pointing to PDF files hosted on various domains, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a likely attempt to redirect users to malicious websites, potentially for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=2013+honda+civic+repair+manual+pdf PDF link annotation
    • https://fuwiwidiwijidex.weebly.com/uploads/1/3/1/6/131637339/fivonibun_nesavo_duvatetezoda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502833/normal_5fcc610140dae.pdfIn PDF document text
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/wisifal-goxeto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479707/normal_6007a396a3b5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413113/normal_5ff4cf79b01d0.pdfIn PDF document text
    • https://pulogumofus.weebly.com/uploads/1/3/0/7/130739416/3be14af.pdfIn PDF document text
    • https://xudufuzed.weebly.com/uploads/1/3/0/8/130815664/ruzapiregojude.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501975/normal_5fc75b9e72d5c.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/ijhache/bang_bang_bang_just_dance_2020_extreme.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478132/normal_6000b21eb3738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_6012dd10cd5ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450632/normal_5ff37f1062947.pdfIn PDF document text
    • https://cdn.sqhk.co/gagufatemo/RON4iR5/doomsday_vault_seed_10.pdfIn PDF document text
    • https://woniwisupu.weebly.com/uploads/1/3/4/2/134266019/wolikamapotegafetop.pdfIn PDF document text
    • https://dapavivilo.weebly.com/uploads/1/3/4/8/134895477/munikuxipoxovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416789/normal_5fd1e5a7451e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jimibidubarabus.epizy.com/35346170816.pdfIn PDF document text
    • http://xevunikusixed.rf.gd/95338916540.pdfIn PDF document text
    • http://naditoliwinudev.epizy.com/duxogoxigivuxujojirodute.pdfIn PDF document text
    • http://kadegezopofog.rf.gd/bid_bond_format.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 5472 bytes
SHA-256: 507590f772cba5ab1be5cc114b888af617a93faa08978aa9c74d4156d4865793
font_01_sfnt_off000100a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 10416 bytes
SHA-256: 9a254b6cb6d4b9727035e0de35c1b019dc619bbde4863f4ecbd43bbd727caef1
font_02_sfnt_off00012443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12443 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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