Malicious PDF — malware analysis report

Static analysis result for SHA-256 6802e95a51fb0a1c…

MALICIOUS

PDF

94.1 KB Created: 2021-06-02 19:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45c954a5bbeb02e1fd59f0cc3ffdee1a SHA-1: db6d2cea7b80e0f3e141a0b9945f4f1fc790a8d2 SHA-256: 6802e95a51fb0a1c5f86ca30dea3c98c8804d8193a2bd4612b8b39d62cff736c
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, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards malicious intent, likely related to directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://crysiq.ru/pbw?utm_term=how+to+breed+mythic+monsters+in+monster+legends
    • https://bogilerilixami.weebly.com/uploads/1/3/5/3/135345361/6add8111ae14.pdf
    • https://veretiwuwe.weebly.com/uploads/1/3/1/4/131406621/dedonisoboben.pdf
    • https://kaposabebozof.weebly.com/uploads/1/3/4/4/134466843/1fef51f2c91bb.pdf
    • https://cdn-cms.f-static.net/uploads/4412902/normal_600d5eede6b76.pdf
    • https://cdn-cms.f-static.net/uploads/4380210/normal_602146b0e8997.pdf
    • https://static.s123-cdn-static.com/uploads/4412183/normal_60021f9be6010.pdf
    • https://kevanosum.weebly.com/uploads/1/3/0/9/130968994/midusakoda_vuxude.pdf
    • https://dumasibomis.weebly.com/uploads/1/3/4/6/134642495/09bbaadf9577fae.pdf
    • https://cdn-cms.f-static.net/uploads/4449992/normal_604fe94e8e9e4.pdf
    • https://cdn-cms.f-static.net/uploads/4420927/normal_601b2ee11c7f5.pdf
    • https://lidelituni.weebly.com/uploads/1/3/1/4/131452972/zenekodilud-pazevolofarekem.pdf
    • https://kofuremejekesor.weebly.com/uploads/1/3/4/2/134235353/tufadudoligosufav.pdf
    • https://suxewanevot.weebly.com/uploads/1/3/4/5/134595646/monugemodivavi_luleporeb_gakukinajujisi_kasibugoximuz.pdf
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/5560291.pdf
    • https://cdn-cms.f-static.net/uploads/4465149/normal_602e6017b46cd.pdf
    • https://vigodozoxofi.weebly.com/uploads/1/3/4/5/134599787/9ab06d28e19.pdf
    • https://nikigefewava.weebly.com/uploads/1/3/0/7/130775032/621616.pdf
    • https://cdn-cms.f-static.net/uploads/4377128/normal_6062f2065fde1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/01a07b40-5b48-4cd8-b4ab-74c9e5e54a67/harbor_breeze_saratoga_change_light_bulb.pdf
    • https://uploads.strikinglycdn.com/files/d4f6b08a-b8e6-4e30-bb6a-54147787fc0a/the_mortal_instruments_city_of_bones_book_free_download.pdf
    • https://uploads.strikinglycdn.com/files/63c950fc-b2c1-4c8b-85a6-d2c37025af4c/nj_transit_child_fares.pdf
    • https://uploads.strikinglycdn.com/files/f5545706-85e9-40ef-b845-e634877c8843/22214850059.pdf
    • https://uploads.strikinglycdn.com/files/f1570fa9-2b7a-457f-b281-da4f3e1de14e/brandywine_falls_hike.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010add.bin
365b546baef58209806a0010c69c94451547ee587a04246e35f742a7557e1947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADD 3236 bytes
font_01_sfnt_off00011667.bin
bce385f903d073559b97f63767a18f7fe817152e62299557c8af093610b62236		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11667 5436 bytes
font_02_sfnt_off000128cf.bin
3d313b245ec2c404b36678c97364c21f8dcb3bf162cdbebc1262c7620be8305a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128CF 15032 bytes
font_03_sfnt_off00015483.bin
e428de66ceb9deebdb53ebe71febfe16dde38f113f03500bd416f391f33c23f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15483 16164 bytes

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