Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b611b0ff03ddd0…

MALICIOUS

PDF

75.8 KB Created: 2020-11-19 15:24:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f48e8fe7ff5e7472b5e0eb883dc97ac3 SHA-1: 19e5953192f3914c259f126c1bdb3600fbd89e45 SHA-256: d0b611b0ff03ddd03da1d16bca41426afdf8e40ba843969739c069bd3b522ce4
156 Risk Score

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 0.9908

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://trafficel.ru/aws?utm_term=implosion+never+lose+hope+for+pc PDF link annotation
    • https://nujamoxe.weebly.com/uploads/1/3/4/2/134234607/wosugulubaro.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
    • https://s3.amazonaws.com/rebesudanolo/97342838069.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/spore_cheat_codes_creature_stage.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/jadual_caruman_kwsp.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/82174017498.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/31130753108.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/battle_leadership.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/jirefobanepinivep.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/febapegupeko.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC267 4752 bytes
SHA-256: 33c6c6febe686712136829f2eb0801e487a3d5c0ce9fd3ae4c3289cce92cc8ac
font_01_sfnt_off0000d24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 15800 bytes
SHA-256: ba5b05aaa60f31b2d73f71b97d4a95069196484e6d92f87565a39d5432160dae
font_02_sfnt_off0000fd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD08 16132 bytes
SHA-256: 43e84046d57c5d8edad47de9228ce36feb53c5e515436c294a71041590f3a3a6
font_03_sfnt_off000111fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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