Malicious PDF — malware analysis report

Static analysis result for SHA-256 624c08f9f4db8c11…

MALICIOUS

PDF

76.4 KB Created: 2021-03-20 10:58:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 759568b98583626f1a0433ddc7537a39 SHA-1: 94b4482a20ff11d91444c35d21183f678e80c779 SHA-256: 624c08f9f4db8c119135eef5b826d8071da84681bbeab676229a3136ec2d66f1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains an embedded URL that leads to a domain associated with coupon codes, likely a lure to trick users into clicking. The PDF structure itself is also flagged for duplicate object bodies, a common obfuscation technique in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://mezovuduw.ru/wix?keyword=bando+boxes+coupon+code
    • http://vemajewedekag.22web.org/40717008516.pdf
    • http://rijewomel.scienceontheweb.net/52281498050.pdf
    • http://wawesoja.sportsontheweb.net/definition_of_community_in_sociology.pdf
    • http://fikosarodone.medianewsonline.com/9572108139.pdf
    • http://kigumelez.medianewsonline.com/60382710870.pdf
    • http://suporefebakibur.mygamesonline.org/nowazuru.pdf
    • http://bumosid.getenjoyment.net/achievers_b1_teacher_s_resource_book.pdf
    • http://fewutame.getenjoyment.net/cement_clinker_manufacturing_process.pdf
    • http://lisuzigerob.mygamesonline.org/rixogur.pdf
    • http://jifoxife.66ghz.com/71130770200.pdf
    • http://fevofawemuwa.medianewsonline.com/vevolosugedop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dovamarun.epizy.com/adecco_salary_guide_2020.pdf
    • http://labomodofu.epizy.com/adobe_after_effects_cs6_tutorials_free.pdf
    • http://zogoxuf.atwebpages.com/twilight_eclipse_full_movie_online_free.pdf
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_4c4662df6d3f43ccb0e3d9b122dd5eb6.pdf?index=true
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_aebbae75e43949c0bad9297e4f24f9be.pdf?index=true
    • http://woranuganavot.myartsonline.com/95474214882.pdf
    • http://pavabiza.atwebpages.com/54921042468.pdf
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_9fc772c283e549a4b8cc877a10032810.pdf?index=true
    • http://zovulebipa.epizy.com/trx_hiit_workout_upper_body.pdf
    • http://mawivevixovoxet.epizy.com/2003_harley_davidson_heritage_softail_classic_owners_manual.pdf
    • http://desujiruvomeb.myartsonline.com/top_100_adjectives_in_english.pdf
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_85eef656b58a41f1be23f8c41176cf13.pdf?index=true
    • 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_off0000ec3b.bin
9405fb63338be3b21643fe8bde70667159b855c9d6eeae5efd39e5d292e2e38b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3B 5196 bytes
font_01_sfnt_off0000fdf6.bin
d84f2338f4b99ffd305ce2d288c23070b9bc0629142be4202640f2e6a23e2b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF6 11212 bytes

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