Malicious PDF — malware analysis report

Static analysis result for SHA-256 68859b8577b96724…

MALICIOUS

PDF

89.0 KB Created: 2021-04-05 02:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a6f67aa81b3d81236caf36e541c2a459 SHA-1: 41dca5283e9f94b4b107b8eb6d27a968e471902c SHA-256: 68859b8577b967243eea8ca3cc1b657064784a4208e3b5d821a86a799afd3cd3
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm or redirector. The primary URL, 'https://soxebez.ru/award?keyword=complete+alt+codes+pdf', implies a lure related to 'alt codes' to drive traffic to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/award?keyword=complete+alt+codes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456391/normal_605ee15ec3446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_5fd7b3abe648c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454170/normal_5fe3d531a376a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450638/normal_60357682752d0.pdfIn PDF document text
    • https://vudolexululuj.weebly.com/uploads/1/3/1/0/131070894/xofabovofezoxoju.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/penakunifoguvikuforisejo.pdfIn PDF document text
    • https://mebodamuruwij.weebly.com/uploads/1/3/5/4/135400263/zawibumugatinab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475577/normal_5fd76e4bd7165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_6033d7f2a0926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490250/normal_6027646d71367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417422/normal_6051d0a125ffb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481168/normal_6009cda06ab2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406464/normal_5fec0931913b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408588/normal_5fcda1e0b494f.pdfIn PDF document text
    • https://jiditejebata.weebly.com/uploads/1/3/5/3/135305220/noniler_juzexadizeged_nurunotizazad.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/banking_awareness_questions_with_answers.pdfIn PDF document text
    • http://fitatuvepejozo.sportsontheweb.net/yoga_poses_and_its_benefits.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_5fe6e1f824f59.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://uploads.strikinglycdn.com/files/eb2540df-e7fc-426f-a839-72b32cfe6b54/dezedazum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5b40e5-b92c-4886-a078-d51dd7f78928/how_do_you_write_a_simple_lease_agreement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7b18103-408c-4876-93cd-c48f6af9b925/lg_front_load_washer_dryer_stack.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_off0000f476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 4864 bytes
SHA-256: 1280c0e81d4ede01a680d9cd4a137250ca9f00799bd50f7b3f98648a9a416b22
font_01_sfnt_off00010505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10505 12164 bytes
SHA-256: 5968525dfdf80c39c613ec8c4b3722e16cec8fd9694171653b411d25186ef15e
font_02_sfnt_off00012dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD5 18564 bytes
SHA-256: ed6a1f5d7849bbbefbec7389fc347b88ee90bac57d43a785e6fb21af2aaf4bd7
font_03_sfnt_off00014864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14864 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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