Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fc40f012b75d8f…

MALICIOUS

PDF

81.6 KB Created: 2021-06-14 10:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b923cd62200af9cfc32e4cd310c672e SHA-1: 22c25a1b4b7c73988ddfee2ab809bc2ec59a73d8 SHA-256: 70fc40f012b75d8fc0321d87dced3f40a113275fa5029d691c18d2692da1c210
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to PDF files hosted on Weebly and other platforms, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://oniceh.ru/pbw?utm_term=don+moen+as+we+worship+you+mp3
    • https://metiwefipit.weebly.com/uploads/1/3/1/4/131406934/cd499b4656e.pdf
    • https://jibowosiz.weebly.com/uploads/1/3/4/6/134632869/8792843.pdf
    • https://vugawijop.weebly.com/uploads/1/3/4/5/134594760/mutabina.pdf
    • https://zilibadokaji.weebly.com/uploads/1/3/2/6/132680781/2476486.pdf
    • https://posapana.weebly.com/uploads/1/3/1/4/131454172/kebotudupa_lubojife_xupadinu.pdf
    • https://pawuzoratifeze.weebly.com/uploads/1/3/4/4/134471058/f80b7e46.pdf
    • https://mopobaseburole.weebly.com/uploads/1/3/4/8/134859053/0ed11e011c44599.pdf
    • https://xipuzitob.weebly.com/uploads/1/3/4/5/134523495/5524557.pdf
    • https://wedovaxebekusos.weebly.com/uploads/1/3/4/6/134634127/dejutowudarabu-winokidizasid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2f2cb8e3-6b69-479a-ab48-575fcf64b6fa/how_to_write_a_case_study_essay_for_social_work.pdf
    • http://nilanom.pbworks.com/w/file/fetch/144419262/lusagafozapo.pdf
    • https://uploads.strikinglycdn.com/files/2c288858-b31a-4472-82c4-679274dd5a26/2322339331.pdf
    • http://pulixojesu.pbworks.com/w/file/fetch/144511596/9821299240.pdf
    • http://jaxonewu.pbworks.com/w/file/fetch/145289649/download_driver_wireless_802.11_n.pdf
    • https://uploads.strikinglycdn.com/files/84c8e591-07bf-422a-b04b-d638a6c9655c/chhello_divas_full_movie_gujarati_free_download.pdf
    • https://uploads.strikinglycdn.com/files/4fdac008-73f2-46e5-8f44-a8e8d5313728/wokudatukifodagapi.pdf
    • http://pudamalulera.pbworks.com/f/monikivetobutaz.pdf
    • https://uploads.strikinglycdn.com/files/c6b1abb1-3d3b-4777-abd2-b7dcd98597cd/bsba_major_in_operations_and_supply_chain_management.pdf
    • http://guleribiko.pbworks.com/f/daviss_drug_guide_for_nurses_11th_edition.pdf
    • https://uploads.strikinglycdn.com/files/b0e73658-3f7f-4b20-8f12-82f39662e816/garmin_zumo_660_benutzerhandbuch_deutsch.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f453.bin
66ce21336e30a65f5192a11bfbd76fcad283a8c06ec0687aa703496966396856
pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 5184 bytes
font_01_sfnt_off000105cf.bin
3dda6d89cf732cd215d0c353d2472c30afbfb9f4564138bba0a97365dedcd3e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105CF 10444 bytes
font_02_sfnt_off0001297d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x1297D 4324 bytes