Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fac7ec0c2bdce1d…

MALICIOUS

PDF

110.3 KB Created: 2021-06-11 19:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 950e06c31c2b72cca5b072a2483a4455 SHA-1: b63a642f998c6ccea0159d26da79c54684915030 SHA-256: 9fac7ec0c2bdce1d0e6e8058fdb6f9f70df648f309552f14c3f148519441b341
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://queure.ru/pbw?utm_term=july+4th+speech+frederick+douglass PDF link annotation
    • https://wunepilupizuxo.weebly.com/uploads/1/3/1/8/131857535/wosuzotoperovawubap.pdfIn PDF document text
    • https://pixerogamaba.weebly.com/uploads/1/3/1/8/131871590/7048493.pdfIn PDF document text
    • https://wapojopaboxijok.weebly.com/uploads/1/3/4/7/134747084/gebiba_tetum_wusovepowemot.pdfIn PDF document text
    • https://xoravali.weebly.com/uploads/1/3/0/7/130775395/27aca.pdfIn PDF document text
    • https://girowefado.weebly.com/uploads/1/3/5/3/135349553/2989453.pdfIn PDF document text
    • https://maparezoja.weebly.com/uploads/1/3/5/3/135321508/pigugomurubevi-jukolag-funanetunegitad-sosuboxuzum.pdfIn PDF document text
    • https://golujubomo.weebly.com/uploads/1/3/4/0/134017735/a5d5f1c4045.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuzimotum.pbworks.com/w/file/fetch/144667179/gradle_clean_test_jacocotestreport.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609c9e73-6cb6-4051-8333-90e10da4afb8/harry_potter_magic_wand_target.pdfIn PDF document text
    • http://vodopaw.pbworks.com/w/file/fetch/144879153/apharan_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add16fb8-6175-4bb4-955e-9ace5e281976/jio_phone_mein_uc_browser_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/399de28a-ef74-4ac0-af1b-855aa1083ef0/83322618464.pdfIn PDF document text
    • http://funesut.pbworks.com/w/file/fetch/144549432/sarukogesabikimarufipurif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/883e73ff-1a7e-4110-aabd-c7250698cf50/is_it_dangerous_to_have_high_blood_pressure_during_pregnancy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d22868c8-67bc-494f-b3f9-5e92ff69cfbf/56240335985.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/w/file/fetch/145121454/malugapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d250d487-2f16-4524-baa5-f5b1bc7617ac/74585193659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583cdf6b-8a08-41bb-963c-1451375c05e7/the_world_of_the_dark_crystal_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cdacce9-f591-4f8f-8a1a-d1fd442c3a2a/interstellar_full_movie_download_in_telugu_dubbed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a7d6fd-ef79-40fe-9474-05d27b60ec9a/where_can_you_get_straight_talk_refill_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a7c4c8a-8582-4da3-bed9-04921da7625c/sikikurosewajezorawipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a7e3fa-bb3c-4ea9-83b6-c3fd883a0815/kuvojefasab.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000172b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172B3 5660 bytes
SHA-256: 6db5af8de6617fbf35efdbaeeeaa48a22aafc49d37ad0d81af0775fd2ec8823b
font_01_sfnt_off00018600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18600 10828 bytes
SHA-256: 29351ee51ed2f218e47c83e61ec70fe32934cabdbb6bc8cff0d3d4bb583b2465