Malicious PDF — malware analysis report

Static analysis result for SHA-256 110fb216bbfc0d60…

MALICIOUS

PDF

77.4 KB Created: 2020-12-16 19:35:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a052928ca4de794572bb104b22548f3 SHA-1: 1a7be4baf6d99205c600630d509e500d437063b2 SHA-256: 110fb216bbfc0d605342af1896434f1a7af640d15434cf0f109bfd95affa8263
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. The primary malicious URLs extracted are traffking.ru and a weebly.com hosted PDF, suggesting a phishing or content redirection scheme.

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://traffking.ru/strik?utm_term=enlightenment+political+cartoons
    • https://jufapagemegugux.weebly.com/uploads/1/3/4/8/134860181/edf5e87bc0.pdf
    • https://cdn-cms.f-static.net/uploads/4390069/normal_5f94fecccd08d.pdf
    • https://nivawapononagi.weebly.com/uploads/1/3/4/2/134234681/vapav_dubuwupavusiseg_tivakumib.pdf
    • https://static.s123-cdn-static.com/uploads/4466408/normal_5fd04c1556afa.pdf
    • https://sofubozunorupid.weebly.com/uploads/1/3/4/6/134668483/9366381.pdf
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/taxonef.pdf
    • https://bososafevibusup.weebly.com/uploads/1/3/4/0/134041518/zisuromepimawuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2a216634-a5d7-4e2b-9008-77887ff2c9e0/a_covalent_bond_forms_when_the_attraction_between_two_atoms.pdf
    • https://uploads.strikinglycdn.com/files/c6bb786e-bafa-4460-b574-a88ba25c0f7b/21_day_fix_food_list.pdf
    • https://s3.amazonaws.com/buganabowumujef/ridobagadikesazefidi.pdf
    • https://uploads.strikinglycdn.com/files/786d9693-f321-424f-a713-351eaad7e1b9/once_upon_a_time_in_china_2_full_movie_online.pdf
    • https://uploads.strikinglycdn.com/files/26c4d7d4-1910-42b5-89e7-fb103700ccd6/kuby_immunology_8th_edition_free.pdf
    • https://s3.amazonaws.com/sirilagewuga/jag_begana_movie.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_off0000e56a.bin
cd0be6fefa2ff22ea11b26813ef43d019d43d7952ce5580488f4ac4e77a9ec45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE56A 5092 bytes
font_01_sfnt_off0000f67b.bin
2f9b4ed9d81589c30f4dd2c377be39decfc229a5a3bec2c0003e2704ba34ea0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF67B 10624 bytes
font_02_sfnt_off00011a69.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A69 4324 bytes

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