Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66aeb554255ae6d…

MALICIOUS

PDF

61.6 KB Created: 2020-11-29 18:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 548bbbee51740b5c5bfcbd5a67d235ba SHA-1: b89166fda86bcbf4629213a93a00e9dc665c2270 SHA-256: e66aeb554255ae6db1f8dc4a0deddf9a6a95fe35c65805a4832e008542328291
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. The document body, though heavily obfuscated, contains text related to "zipper repair kit michaels" and references the authoring application, suggesting a lure. The presence of multiple external PDF links indicates an attempt to manipulate search engine results or direct users to malicious content.

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://cctraff.ru/123?utm_term=zipper+repair+kit+michaels In PDF document text
    • https://mesakejaj.weebly.com/uploads/1/3/4/7/134754162/f1fd11140596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408853/normal_5f97a5efcc25c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418747/normal_5fa24f73d5b0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f8d323ceecd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_5f98a226bc8a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5fbc2d27b7b90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f9c6b5593556.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/rerinago/xadedibawefet.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/882232555.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/maxiwewubapibuxidis.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/mii_maker_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/pedipuzot.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/77598886764.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9CB 4764 bytes
SHA-256: 7f0f746cc8123c4e0effee122c44cbc54165701fffa78c82be4d205ac52e740d
font_01_sfnt_off0000b9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F3 9812 bytes
SHA-256: ca60729acd0ee4b3f16078d616e0a54b6d3eb4695bd3855c0e3248080cb77f79
font_02_sfnt_off0000db99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB99 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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