Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f8643fae3b5e2f…

MALICIOUS

PDF

78.6 KB Created: 2021-03-08 11:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 438a7276a54536b277b2a0e2697da2f8 SHA-1: 5f91507857c6888ff987789f2cc52fc66f2a7989 SHA-256: 14f8643fae3b5e2f2b3cd6707cb276d49f7334c1f27b4c178b2ce1144ce63936
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm designed to drive traffic to potentially malicious sites. The embedded URL `https://soxebez.ru/strik?utm_term=what+battery+does+my+ford+key+fob+take` is likely used to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/strik?utm_term=what+battery+does+my+ford+key+fob+take PDF link annotation
    • https://zozidilaxi.weebly.com/uploads/1/3/4/4/134491322/3015ec65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_602031b360f0e.pdfIn PDF document text
    • https://volexerakonoza.weebly.com/uploads/1/3/4/7/134713377/17fca.pdfIn PDF document text
    • https://gozaperirij.weebly.com/uploads/1/3/1/1/131163841/zarunurozetoruguni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480402/normal_6004cd35c054e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383471/normal_60091b3b2258c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_6037c8bed9956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_60228eb7c962b.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/rarisifu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f707852-a84b-423b-8953-f989aac13b7b/88656299949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4e57fb-2e8e-4044-b54b-4e62d436ffbf/girl_boss_movie_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6c340d3-a81b-469b-b669-0938592ebe79/debojugojukasanizamejavid.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_c7ef9ab448dc40da97a5a7b1b80d6aeb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9b95dc-c61b-4242-8892-3c4bb8553dd3/little_prince_book_in_french.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/303d52cd-3f05-4ee3-915e-3e7d85eaa29d/tones_in_poetry.pdfIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_6a29d4a31c6d479196ec5012ac93dd7d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb22dbb1-5b30-402e-bd22-aefa84d88bec/us_military_reserve_benefits.pdfIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_88f670dabe3a44489f93bb2d4a317714.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12eb55cc-0b9f-4ab7-a88e-5533e5e558db/tozidurotofofawizejeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0df7e6-b3d4-42ca-a49c-bedfb38f175e/best_way_to_learn_organic_chemistry_reactions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3caf37a5-2dc3-49d3-bcc0-838e39c13028/26869839277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1edc3c8-5a76-451d-951c-a42c3c87e44f/dr_seuss_baby_books_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b80c9eef-8e73-481c-82d2-f1f23a7c3963/40463943751.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFB 5436 bytes
SHA-256: 7e409e6470c3b71e11bae6d35ab1a6e3cd57e2ad150fcbb7237535886dfa3649
font_01_sfnt_off0000f059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF059 10840 bytes
SHA-256: 29797e599ab11972aa141073a34aa25017ee4e738e611b23ffe81a482c08837e
font_02_sfnt_off000115bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BB 16132 bytes
SHA-256: 29a60492f44b39d68fa00197234d6df9a0cf581d74754725da64c153577ac146