Malicious PDF — malware analysis report

Static analysis result for SHA-256 34de98d7808e893b…

MALICIOUS

PDF

78.6 KB Created: 2021-03-31 05:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1287ecd77c6bbacbfae60afac52215f6 SHA-1: 2e7e8337dc13d4f0f800dc016a399ee42de77d10 SHA-256: 34de98d7808e893b35c3e6111c97ad4b719b33d135bb1c5b87d93c1775ed906b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=are+dmv+open+in+south+carolina
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5fd1e16191c73.pdf
    • http://free-at.pro/1._bowers_wilkins_formation_wedge5xlol.pdf
    • http://de-bewertung-id2842384.icu/film_the_hunger_games_mockingjay_part_2_subtitle_indonesiac2ycl.pdf
    • http://gogotmif.space/65092244147ln865.pdf
    • https://static.s123-cdn-static.com/uploads/4369149/normal_5fc6fc5163b64.pdf
    • http://tidivon.iblogger.org/10707842405.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_3a62861614a2487e880b718457a170ea.pdf?index=true
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_4ca0bf880bad4188bf91e99a2d67a711.pdf?index=true
    • http://bozuguluro.rf.gd/bodmas_related_questions.pdf
    • http://pirigebosagome.rf.gd/amazon_case_study_2020.pdf
    • https://5b3500e9-40b4-440a-9ada-171ed8bcf4c9.filesusr.com/ugd/7820d0_3a25ad1cdb6e4f44b041907e04ee4c4e.pdf?index=true
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_c5865206f3aa4ce19648959b85a072ec.pdf?index=true
    • http://zezatavaveb.epizy.com/mukonapibijavuno.pdf
    • https://3d636ecf-b5c4-4691-845c-2d501a7a8090.filesusr.com/ugd/b09df1_e6c835874e7f412988b1d0792428e094.pdf?index=true
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_ad6af078a7c94d62ae6202956e73603f.pdf?index=true
    • http://xorewabamav.epizy.com/xabikeruvoburagenafa.pdf
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_c2c0f20b3a874106be85188641200899.pdf?index=true
    • http://vedogitunenaki.rf.gd/what_is_the_plot_of_the_monkeys_paw.pdf
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_fec89209a34846a6b46420f9be374332.pdf?index=true
    • http://wevenabod.rf.gd/63427982461.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_off0000e93d.bin
29f753b5ed9e2ec2caa508eb26eacf1716f600399970bd292893267dbdf79567		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 5244 bytes
font_01_sfnt_off0000fae2.bin
bbcb96f6b701bee3a8296e05d55558050af3b2244b2af291c99c2dd9215fae67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE2 10616 bytes
font_02_sfnt_off00011f1b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1B 4324 bytes

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