Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ddd9bf41cb89c5…

MALICIOUS

PDF

89.3 KB Created: 2020-11-19 10:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57c8d5d02303b3d90e3e29cf1db1b69a SHA-1: 1d144e65ee6374d0ed35e60e7a168396fe014d64 SHA-256: 63ddd9bf41cb89c559431e50d2a53ed52d6ddd98110d800c13c079da77c7dd41
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on Weebly and other platforms. One of the primary URLs extracted is 'https://traffnew.ru/123?utm_term=pathfinder+vindictive+bastard+spells', which is likely part of a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=pathfinder+vindictive+bastard+spells
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/78f4c1a549b16.pdf
    • https://mivopolidenez.weebly.com/uploads/1/3/4/3/134349928/1805981.pdf
    • https://segawerod.weebly.com/uploads/1/3/4/3/134313685/7933638.pdf
    • https://tigizojotajubum.weebly.com/uploads/1/3/4/4/134489046/vepuko_garura.pdf
    • https://xiletepegokif.weebly.com/uploads/1/3/4/3/134319576/330081c9.pdf
    • https://bigimenuxorotel.weebly.com/uploads/1/3/4/6/134655509/makezobilibobedewipo.pdf
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/xiweleligu.pdf
    • https://wofinomedek.weebly.com/uploads/1/3/4/1/134108675/a107941dfdb95.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/04efd5ad-4c15-4525-8d97-45581a8fbda1/kimunapezadoritanarixan.pdf
    • https://uploads.strikinglycdn.com/files/bdcced6a-7833-4c3c-940f-c61fcb70d0bd/tamobilebakis.pdf
    • https://uploads.strikinglycdn.com/files/36375011-1962-4a77-903a-521a365f0557/hiit_workout_plan_for_men.pdf
    • https://uploads.strikinglycdn.com/files/df2055cf-da2e-48f4-a530-f974683653d0/hvac_troubleshooting_book.pdf
    • https://uploads.strikinglycdn.com/files/05d421f5-d68a-41d5-bc54-14e11f053505/60344915723.pdf
    • https://uploads.strikinglycdn.com/files/a5981ea8-f9ae-4892-a6c2-9f16e281bf50/rosemarie_tong_feminist_thought.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113d2.bin
5090b3acf1425b03dcabc0e9a0d7217c3c4b21bb40527fc4275d22b7977d421b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113D2 5124 bytes
font_01_sfnt_off0001252a.bin
3f3a74fbd35ab9d9f57b451e08b3cd813d7f3f008931124efe912e5498d0b94b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1252A 10740 bytes
font_02_sfnt_off000149c5.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149C5 4324 bytes

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