Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca70c6a9d9ae826a…

MALICIOUS

PDF

74.9 KB Created: 2021-04-24 00:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a08e02be8e0ec304fe221620f50aaf31 SHA-1: 2ae800fdb7dfffdfea9f09ac9b8f75f703697a0c SHA-256: ca70c6a9d9ae826a80fc67a5659f307f2e522f19f28793372be4521ec30c42e1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains embedded URLs that redirect to suspicious domains, including one that appears to be a link farm on disposable hosting. The document body, though heavily obfuscated, contains text related to search terms, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=john+deere+mower+deck+wheel+bolts PDF link annotation
    • http://doruguduku.iblogger.org/widugolivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489716/normal_602f97a8b3ea1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461516/normal_605d6eedeafc9.pdfIn PDF document text
    • http://zonagareme.getenjoyment.net/all_flip_flop_truth_table.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/ciij8ig/4876575584.pdfIn PDF document text
    • http://wativeb.mypressonline.com/bbc_learning_english_pronunciation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425514/normal_6032716e954fe.pdfIn PDF document text
    • http://vodenupomotafi.22web.org/bissell_vacuum_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewejav/17qLPRy/una_vida_saludable_frases.pdfIn PDF document text
    • http://dudisigufazalu.22web.org/shinjuku_shopping_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/abdominal_workouts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a40aeb2-c99a-4c4a-8081-98689c54d62b/nora_roberts_of_blood_and_bone_sequel.pdfIn PDF document text
    • http://benuvaf.rf.gd/21158774160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e0aa1c-f9e2-4499-8f3a-95a85f3d31ed/jetefukavuwulesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc4ca263-32a5-4b6b-b74d-887c4da7208e/how_to_study_for_phr_exam.pdfIn PDF document text
    • http://sasofinifujilo.epizy.com/insinkerator_installation_tool.pdfIn PDF document text
    • http://burefuwuterawuz.epizy.com/fusionner_avec_adobe_reader.pdfIn PDF document text
    • http://robatirewixiwol.rf.gd/70671016476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5584c5e5-62e9-4727-b38d-d104be69b3e3/spectrum_tv_remote_control_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1f1aa4-d2fe-407d-81bc-75e0bdacd45c/fl3ac_flir_one_pro_lt_usb-c.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_off0000e6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C4 5256 bytes
SHA-256: 3e7a065415eee2a3137a892ed37b41f3f3ec3e313a0c42b1ed3995997f6b4d21
font_01_sfnt_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 11024 bytes
SHA-256: 4381e3eae8f34b0e109c14640b062a60d3a57f1ad2cd8cedfff082de19d70fe2

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