Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67b6f813f9fcd72…

MALICIOUS

PDF

75.4 KB Created: 2021-03-11 08:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: cacc1d4a60fd09f4bbf662d6faf21039 SHA-1: 9b54db945abf7f9141d8e5166d33b8785cdca103 SHA-256: e67b6f813f9fcd72044227b901e5c6c1cec27ed7d30ae172423c0761323b6bb0
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish for information. The presence of a 'download' button lure further supports a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/123?utm_term=create+new+sheet+in+excel+vba+macro PDF link annotation
    • http://kedugobepuged.mywebcommunity.org/gomiwesebegezijudewum.pdfIn PDF document text
    • http://domen3.club/ipc_j_std_001sdsgy.pdfIn PDF document text
    • http://blockhcain.host/rufejifajidewodisomedijorrjtj.pdfIn PDF document text
    • http://kraftmann.su/acids_and_bases_quizhrjsy.pdfIn PDF document text
    • http://mignonette.space/safety_first_ear_thermometer_battery_typehu0e3.pdfIn PDF document text
    • http://dabopoxele.getenjoyment.net/77656486914.pdfIn PDF document text
    • http://kigurumi.org/transformers_autobots_assemblexg6p6.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/33770625813.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_12fb362201f04785b7b66c35f58ffd38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/487e1737-514e-44d5-82fa-1e37e4747194/how_do_you_reset_a_ducane_furnace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a3935df-f6cd-4d7f-93b2-41e9548861c9/74866356785.pdfIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_6658570e43934c709ba1072cfd87ed2e.pdf?index=trueIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_5d8ea4c630194f9b9e61555e58a8fb45.pdf?index=trueIn PDF document text
    • http://pababevo.epizy.com/heart_failure_esc_2016_guidelines.pdfIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_3b1dfac1fa4845d689df3ddaba7a4729.pdf?index=trueIn PDF document text
    • http://zikoliduxa.atwebpages.com/effective_c_book.pdfIn PDF document text
    • http://raxusitusumulag.rf.gd/98816597902.pdfIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_fc36bc1d188247588d55157ed4d35e79.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_368b8f6e3e384cdcbe202b27ea15da96.pdf?index=trueIn PDF document text
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_c16466178dc14959ad6ab07ef2cc5ac7.pdf?index=trueIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_f22d2968152e4c32863499916eb2a079.pdf?index=trueIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_5b77671cf47e45ec9fb92e2aac690c15.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 5304 bytes
SHA-256: 3836603936233ff75e59e7ed86608327126b0b077ae985fe5d0e72061867abac
font_01_sfnt_off0000fbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD1 10684 bytes
SHA-256: 152231a51c5a026cb150871402e05d7ccde9dbf5d1d7af5f7f981c1ab6221f57