Malicious PDF — malware analysis report

Static analysis result for SHA-256 0daf6ed65328a41e…

MALICIOUS

PDF

77.1 KB Created: 2021-03-30 17:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 01b8f86d364cbb5dee1a0b0d65b0c358 SHA-1: 39e3beb6d9da766901fb932d4586125bf3dfb966 SHA-256: 0daf6ed65328a41eeee21109b4bf667f6a02b2accbc6c5d8e4b817412812f9cc
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=enlace+metalico+ejemplos+pdf In PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/9169647.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/7632915.pdfIn PDF document text
    • https://cdn.sqhk.co/rinovizifim/DFijIvR/horror_sounds_of_the_night_mp3_download_pagalworld.pdfIn PDF document text
    • http://zakedifive.iblogger.org/11578924439.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/EHheKgd/batman_the_telltale_series_gameplay_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/dkjezfi/57804085471.pdfIn PDF document text
    • https://mapuxotegudu.weebly.com/uploads/1/3/4/3/134356271/1113157.pdfIn PDF document text
    • http://natusab.22web.org/gufuvulikerefenadaraw.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/ihcjftN/how_to_make_mask_of_animals_with_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/iaAjrjj/voice_changer_voice_recorder_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/jfWgghe/baxisomugor.pdfIn PDF document text
    • https://cdn.sqhk.co/jivumigen/JtjbVLh/vidimuzegerosedaranakuxu.pdfIn PDF document text
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/a6b37a4d025feaf.pdfIn PDF document text
    • https://jonokerozub.weebly.com/uploads/1/3/4/7/134714828/975b5943006ee.pdfIn PDF document text
    • http://nopazurexubiwis.22web.org/73443336296.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/idifWcf/infinity_insurance_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/seranowe/jdihmp2/12041780217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/towakog/classical_music_free_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/mafaveripowamef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55cc658-21ec-4721-928e-a6700a83d4c5/streaming_fifty_shades_of_grey_2018_full_movie_sub_indo.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/66443155868.pdfIn PDF document text
    • http://jupofoxina.rf.gd/comment_couper_en_deux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f016a2-776d-457b-a359-87899d8b58b2/how_to_prime_a_graco_magnum_x5.pdfIn PDF document text
    • http://kokidudelilusib.epizy.com/arabic_language_course.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/69148966859.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_off0000ec9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9A 5236 bytes
SHA-256: c59cffdbde934fe67769f7a7b983db4f599f081369fdd8a21150b10d1e34b27e
font_01_sfnt_off0000fe66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 11884 bytes
SHA-256: 8af7ceae14dcfa008a83cc80c07e585c347931164644720fef4d517e97d7c6ae

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