Malicious PDF — malware analysis report

Static analysis result for SHA-256 91c6646e3f1f9e4a…

MALICIOUS

PDF

88.1 KB Created: 2021-01-03 09:17:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fe26aecf612ef6ce6e301d6466694995 SHA-1: e8dc6fb80c50791c4e72ea09c4f92add718d0b25 SHA-256: 91c6646e3f1f9e4a16420e68ccafbff6513e4b4f54f943a0a220c08ee714b2ca
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to lure users to external sites. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=basel+risk+categories+operational+risk In PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/1cba8b6b05.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/potutiruloj-mapobakemi.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/junevefufijade.pdfIn PDF document text
    • https://rebenanutizoder.weebly.com/uploads/1/3/4/7/134752372/sozug_xekokozuminazep_dalazilalebinor.pdfIn PDF document text
    • https://xekuvezenigut.weebly.com/uploads/1/3/5/3/135346982/c7cd655fee86bbd.pdfIn PDF document text
    • https://lafadulow.weebly.com/uploads/1/3/4/5/134591129/63a675a4f1965b.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/khfIig9/zuxixivegekew.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/mejigavukolu/pekoni.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/back_to_eden_health_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/13889063079.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/vocabulary_for_ielts.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 5004 bytes
SHA-256: 8cd7daad7298fb7082b8202e00d3cb674e84e63c16599162e4fa1f43468809f4
font_01_sfnt_off000108e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E5 11604 bytes
SHA-256: 0a35691928cc3aad4e22f7ad2e61856bd77879e278b9348a29abbda47647be6e
font_02_sfnt_off00013091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13091 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550
font_03_sfnt_off000144f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144F9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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