Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6ca5b242ad3f76…

MALICIOUS

PDF

85.3 KB Created: 2021-03-31 02:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dfaec5fc6ab44063f15829ff837f151 SHA-1: abb8f2de7c553eff3156e6a1c65f498f840f7885 SHA-256: cd6ca5b242ad3f7663e32b808f3edaf00bbf3b2143d551261ff0fe7aa0a6f171
196 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for an advance-fee scam lure, indicating it attempts to trick users with promises of prizes or funds. It also contains an external URI pointing to a suspicious domain, likely intended to lead the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://midufefew.ru/strik?utm_term=the+art+of+racing+in+the+rain+quotes+and+page+numbers
    • http://xakovakaxevasul.22web.org/75029021923.pdf
    • https://cdn-cms.f-static.net/uploads/4478378/normal_5feaf7edb9f06.pdf
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/4241675.pdf
    • https://nerutemiwuxofa.weebly.com/uploads/1/3/1/3/131398157/vojotore-fanuwofude-roxebivezerur-jetaxasudo.pdf
    • https://cdn-cms.f-static.net/uploads/4481062/normal_5fd1abdfd425d.pdf
    • https://womarunere.weebly.com/uploads/1/3/4/3/134315700/jijuwutiniwulemele.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7387b16f-4f69-4bd7-958b-fd3fd31573f0/sony_cdp-cx355_parts_list.pdf
    • https://uploads.strikinglycdn.com/files/f5db395f-5efe-4177-aece-917bef45d2f5/jolibanetigafepufagenemut.pdf
    • https://s3.amazonaws.com/ropuba/bahubali_movie_telugu4u._net.pdf
    • https://uploads.strikinglycdn.com/files/4cd3973f-281d-44d4-a327-1e81b80d72f4/how_to_do_hand_lettering_on_procreate.pdf
    • https://uploads.strikinglycdn.com/files/9a6dfa13-b8ee-43b7-8281-42640f65d09e/onkyo_tx_sr608_specs.pdf
    • http://jisemitasun.epizy.com/lizewerakijoramedaki.pdf
    • https://uploads.strikinglycdn.com/files/44ce6c18-4fd0-4ba2-970c-376f15fac45a/7454966060.pdf
    • https://s3.amazonaws.com/pibabopuduj/behaviourism_watson.pdf
    • https://uploads.strikinglycdn.com/files/f2f536be-1939-4841-a18a-fd1ffc90d1bc/how_to_record_sales_discounts_in_accounting.pdf
    • https://s3.amazonaws.com/zibenoroduzuw/minecraft_anti_knockback_hack_1._8.pdf
    • https://uploads.strikinglycdn.com/files/7acee35f-0f03-44f5-b9f6-793393d2616f/lumuwidufumebezopizaw.pdf
    • https://uploads.strikinglycdn.com/files/fbe66864-eb77-4a35-a45b-f2c6b5b1d0bf/movie_review_template.pdf
    • https://uploads.strikinglycdn.com/files/6477523e-8de5-450c-92c4-017c7eaa86e9/how_to_adjust_a_coaster_brake.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ec7.bin
02fcf4ee110b2ffec14727a19516a657a6ee51ed111f45af1b2509c152797cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC7 5752 bytes
font_01_sfnt_off0001221f.bin
20a2692a531831af283b1a8a03d92be1aa63403151479a81db9fd7da4e770491		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1221F 11264 bytes

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