Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63dd79a8f643a82…

MALICIOUS

PDF

89.0 KB Created: 2021-03-05 08:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab04ba24ca4671412da41cafc44c2a9d SHA-1: 7ce7aeba89e0558f0e96c36bf5b82522945f504a SHA-256: e63dd79a8f643a82c3e12132e72498537f8c7b55154062550036d3251507705b
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 numerous external links, suggesting it is part of an SEO spam or phishing campaign designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, appears to be a lure related to chemistry problems.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://seumenha.ru/wix?keyword=ghs+honors+chemistry+stoichiometry+problems+worksheet+1+answers
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/roxalujal.pdf
    • https://cdn.sqhk.co/vovewotutal/gcigWja/gower_bike_ride_2019_road_closures.pdf
    • https://cdn.sqhk.co/wetiniwem/7ihG4gf/new_werewolf_cat_breed.pdf
    • https://cdn.sqhk.co/vijukifezu/dajdia0/wukisedokesokojajeril.pdf
    • https://xadixifiv.weebly.com/uploads/1/3/4/8/134888816/c4df17be927.pdf
    • https://cdn.sqhk.co/buzomesil/h354icu/wexam.pdf
    • http://welutotadaxol.iblogger.org/gayhurst_school_gerrards_cross_ofsted_report.pdf
    • https://pakopigame.weebly.com/uploads/1/3/0/7/130738837/9193428.pdf
    • https://cdn.sqhk.co/lawipavoso/geqvjea/namazoxeba.pdf
    • http://novinove.iblogger.org/nabojivegufujazepogojo.pdf
    • https://cdn.sqhk.co/kajurineg/hblifjI/86906096793.pdf
    • https://cdn.sqhk.co/vajirasavuz/fI38ggD/15455375130.pdf
    • https://cdn.sqhk.co/dudugetogi/53cu8ia/47384694175.pdf
    • https://xunujilitaga.weebly.com/uploads/1/3/5/3/135315779/4f5659744a7b.pdf
    • https://josapepukixo.weebly.com/uploads/1/3/1/3/131384602/81f13894a0e1.pdf
    • https://waxukazo.weebly.com/uploads/1/3/1/0/131071095/6166677.pdf
    • https://sewobefavewekog.weebly.com/uploads/1/3/4/3/134367647/80efdfea8116.pdf
    • https://gogalafubixuvu.weebly.com/uploads/1/3/4/6/134642314/b4a8144461fcd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bejovivijif.epizy.com/chakravarthy_film_video_songs.pdf
    • http://vogojitipam.epizy.com/kiruvevigobukewobepufit.pdf
    • https://uploads.strikinglycdn.com/files/5ed00040-0881-4043-8e99-d71892a0b40d/42441960031.pdf
    • https://uploads.strikinglycdn.com/files/cef368fc-6c69-461d-b729-404cd508db2b/what_does_not_equipped_with_uconnect_phone_mean.pdf
    • https://uploads.strikinglycdn.com/files/4a46e9df-30ea-4ce4-8e9e-7ac0a3e934b5/la_siesta_del_martes_summary_in_spanish.pdf
    • http://salulasalanegox.rf.gd/bluestacks_3_free_64_bit.pdf
    • https://uploads.strikinglycdn.com/files/b9f8fef7-d10b-4d8e-a156-abb940c0d345/navila.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_off00010eec.bin
762eac25d0eadfee3be4c6b6946e7e28eb083b86525856f649863f00c37add30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEC 5440 bytes
font_01_sfnt_off0001214c.bin
fdaa1ee9a4eacef82853417af3cbd81f86b928ff7b6c4e597742d3476780cdc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1214C 11096 bytes
font_02_sfnt_off00014762.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14762 4324 bytes

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