Malicious PDF — malware analysis report

Static analysis result for SHA-256 eacb9c4317df364a…

MALICIOUS

PDF

73.9 KB Created: 2021-05-12 16:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 946424090952672623aef1cd567f6dc0 SHA-1: b1831dcebe09e40c44670ed9f7a1b8e0325cd671 SHA-256: eacb9c4317df364a2f0f1999c22c298ad4f88a35e38e1dce85c1faf2eb12decf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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://golowaki.ru/strik?utm_term=sony+str-k502p+reset PDF link annotation
    • https://patipuvilinuw.weebly.com/uploads/1/3/4/4/134487218/2f62fc485803d.pdfIn PDF document text
    • https://woperuxotuxolo.weebly.com/uploads/1/3/4/8/134849923/nurumumanuziwi.pdfIn PDF document text
    • https://jimilosebot.weebly.com/uploads/1/3/4/0/134096588/5459170.pdfIn PDF document text
    • https://waperimawomexav.weebly.com/uploads/1/3/4/7/134733778/9350795.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/dukuxujog_duvivetedepimes.pdfIn PDF document text
    • https://junapeborizako.weebly.com/uploads/1/3/4/4/134443413/4664930.pdfIn PDF document text
    • https://taxirexojonub.weebly.com/uploads/1/3/4/7/134767272/30afd9a71bcd11b.pdfIn PDF document text
    • https://dozunetad.weebly.com/uploads/1/3/4/4/134472758/f91c27eeabc.pdfIn PDF document text
    • https://xevowuzari.weebly.com/uploads/1/3/1/4/131437308/101162e55d98454.pdfIn PDF document text
    • https://zedebofewel.weebly.com/uploads/1/3/4/5/134594015/vadam_kitoruki_valifeser_zawanotoruz.pdfIn PDF document text
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/468766.pdfIn PDF document text
    • https://lilufegat.weebly.com/uploads/1/3/5/9/135965666/38d7bc54c6.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/108c03fac0988f.pdfIn PDF document text
    • https://lowunipuso.weebly.com/uploads/1/3/1/4/131453219/6998091.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d9f32f1-468a-4e6e-8fd0-236262902e57.filesusr.com/ugd/28860c_8e81ac06de29413da82903b23d4b7f41.pdf?index=trueIn PDF document text
    • https://58fabbca-0322-4868-a582-948aa19840f9.filesusr.com/ugd/93748c_3460b9b762f04b6c98787c347c8efdf6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3276e04-8470-4ec3-8af3-c82f33a9d91a/canon_pixma_mx922_price_australia.pdfIn PDF document text
    • https://203e60c5-e32a-4587-ab6d-31d66de6d5b9.filesusr.com/ugd/014c36_98c0f3c63f84442291c03bf519bada40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c655c6e3-d8f3-497e-985d-15c6aa3861a6/30486202845.pdfIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_43514bbb1cef40b0be4d84f5f645e7e0.pdf?index=trueIn 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_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 5268 bytes
SHA-256: 3f7e39780e09f14385275cc4d96ff904aaa666e4d743c72534b8a3d39d151029
font_01_sfnt_off0000f492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF492 11156 bytes
SHA-256: a067281d56b6e6483ef84fe0961583ae4e2fd09ec1d02da4e566eea776d085d6

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