Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff03b9f4a895655…

MALICIOUS

PDF

71.7 KB Created: 2021-02-23 04:17:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 490e581cf50f77038da22ef28f09b23b SHA-1: 5887897302d7815443650b1b507640fb08eb3bc7 SHA-256: 3ff03b9f4a895655f76cb8bd76ff7a76d7444d089482a937ed4d02a9b9d0a41a
156 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 0.9998

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://crophysi.ru/wix?keyword=audi+mmi+navigation+plus+manual+pdf+espa%25C3%25B1ol PDF link annotation
    • https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/3483f2.pdfIn PDF document text
    • https://diwekivoveludu.weebly.com/uploads/1/3/5/3/135313391/1078820.pdfIn PDF document text
    • http://copyrightprivacy.site/27453442509cdlj7.pdfIn PDF document text
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/logenaja.pdfIn PDF document text
    • http://matras-24.ru/lirepuveb6s52e.pdfIn PDF document text
    • https://fumirufax.weebly.com/uploads/1/3/1/8/131856188/9757534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_60291d4e28b51.pdfIn PDF document text
    • http://deemonatrafik.xyz/wifi_booster_pro_full_apkvu6ix.pdfIn PDF document text
    • https://velonifiwivuli.weebly.com/uploads/1/3/0/7/130739758/7bc609c5d.pdfIn PDF document text
    • http://boost-store.net/54487064131ih88o.pdfIn PDF document text
    • https://lufavivuda.weebly.com/uploads/1/3/4/3/134340228/kamow-jefaduji-komogo-jasutovonadewef.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/bajapovogam/google_photo_sphere_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/tinevipafakuzidodujepif.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/what_are_the_three_types_of_deterrence.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/85977528517.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/64603832160.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A6 5528 bytes
SHA-256: 1d8861007edadb52bf7cdaf4628dae0da3c30258753f39e7301e7023e79f1559
font_01_sfnt_off0000d62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62D 10412 bytes
SHA-256: 40a5e5db0d73739297ff7d940d13f435d528401302ed0cee55dc6ec1164452e4
font_02_sfnt_off0000f9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D0 16220 bytes
SHA-256: 190fe1ee671a692b21adcb8eec05e87b108b6528b1ec362376566d2fcf3b4c37

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