Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a74717d136f4184…

MALICIOUS

PDF

82.8 KB Created: 2021-03-31 05:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c645ee88b2476fcfc15088a72ced4580 SHA-1: b48a895268ebbae386b0216810521c61955d4e7f SHA-256: 0a74717d136f41845a91594d4a96e5ba673b4006e47f81110259f6ddae0f1968
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as legitimate PDF downloads. The heuristic PDF_SEO_LINK_FARM and ClamAV detection indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the document body's reference to 'Investir pdf telecharger' suggest a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/wix?keyword=investir+pdf+telecharger
    • http://ses-paypal.com/fond_du_lac_wi_reporter_obituariesebzy6.pdf
    • https://cdn.sqhk.co/fokapalo/4jahbjf/tepopakupakavepizur.pdf
    • https://cdn.sqhk.co/vawadawuleja/Vj7gehe/kinetafiburolo.pdf
    • http://chambreapp.xyz/diary_of_a_wimpy_kid_dog_days_castjtxmk.pdf
    • https://cdn.sqhk.co/jixasamo/oIgdiam/student_enrollment_form_template_word.pdf
    • http://keksik24.ru/linking_words_for_essays_uk0pkez.pdf
    • https://gavedomosuzutu.weebly.com/uploads/1/3/4/2/134234743/devil.pdf
    • http://noksipals.online/bluecoat_proxysg_configuration_guidevqg76.pdf
    • https://cdn.sqhk.co/tupujokuz/T2RgilQ/novobapu.pdf
    • https://cdn.sqhk.co/dutedape/iihfqif/67478020449.pdf
    • https://ganubidorebe.weebly.com/uploads/1/3/2/7/132740923/lijenu.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://60ceb029-6f78-4d42-8ea4-15ca08d8077a.filesusr.com/ugd/857e61_b643bd2a88ee45ecba22689f25c1a595.pdf?index=true
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_1e6f59edd1a0420fa9a7107c0a8891bd.pdf?index=true
    • https://s3.amazonaws.com/gomakobez/honda_eu2200i_recall.pdf
    • https://s3.amazonaws.com/tezofuretejom/how_to_make_a_flying_nun_costume.pdf
    • https://s3.amazonaws.com/lusabifef/how_to_break_open_a_sentry_safe_without_a_key.pdf
    • https://uploads.strikinglycdn.com/files/97f8d1d1-efea-4eba-88ed-fff77019cbdd/19662025818.pdf
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_5e7aa52703cb4571bb05aa9f076682cc.pdf?index=true
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_6d9a492447374a8e82131d608cf91544.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9578a5d2-ab3f-4c21-b09b-a1f72ef37e23/47700840185.pdf
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_815eadb7a7ac48a7814e0f036aa60617.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec27.bin
d292133aab892203d0834cd23a6c87b5da3fc62eba6b96714edf0be60c3a5502		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC27 5412 bytes
font_01_sfnt_off0000fe96.bin
0247eea952f5a811f625b573e8ce3da511b8d9a560039e7bdde8f3ebc6977397		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 12480 bytes
font_02_sfnt_off0001269b.bin
f9e711f2bfa3a8b6ac2e655ede59d1153c5b1845b6ef0bf43f0f7514c3c7ee70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1269B 16232 bytes

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