Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b4fa2af817b447…

MALICIOUS

PDF

94.7 KB Created: 2021-03-21 09:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0273c1abdd86e698d4480c869616c82c SHA-1: ed2dbb098d96aeb42822a0f0c2c71a5e39224b4d SHA-256: 65b4fa2af817b447d608da0c68d4b717202bc0a86d0ac35ec22081c0e3eb19cb
194 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm. It contains numerous external links, including one to 'maypoin.ru', suggesting an attempt to redirect users to potentially harmful content. The document's structure and the presence of multiple links on disposable hosting indicate a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/123?utm_term=myanmar+travel+guide+blog PDF link annotation
    • https://mefewenitili.weebly.com/uploads/1/3/1/3/131379946/c2e88df1e37f61.pdfIn PDF document text
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/molipozilizuluw_fosinesefem_popaxiv.pdfIn PDF document text
    • https://teseresoj.weebly.com/uploads/1/3/4/6/134644138/31e5fbb5.pdfIn PDF document text
    • https://mibirewisurux.weebly.com/uploads/1/3/5/3/135313447/4496936.pdfIn PDF document text
    • https://lujisitezolip.weebly.com/uploads/1/3/4/1/134109273/4258055.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/betefibabiteb.pdfIn PDF document text
    • http://fexodubavilukub.22web.org/bise_sukkur_board_matric_result_2020.pdfIn PDF document text
    • https://pabeliribid.weebly.com/uploads/1/3/4/3/134384766/xaril.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c28bada0-8b93-4d38-8b93-46fdc1341e62/can_you_play_monopoly_with_2_players.pdfIn PDF document text
    • http://gexazavere.epizy.com/karitifivaxawire.pdfIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_be3dd257c3f84cea979afe6c6824f090.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5fb5082-60d0-444b-bec4-46389477c653/9033844362.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_d970ea027ffb4ce0bedf589ca01eec3c.pdf?index=trueIn PDF document text
    • http://robebiwasufilu.epizy.com/34085652537.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_2619a7ac52fc48abb8f4990e02f0a6b3.pdf?index=trueIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_f829866bd3674a7992772bdfc67eeb43.pdf?index=trueIn PDF document text
    • http://zifejurujudeku.epizy.com/rariximobajadamarakaka.pdfIn PDF document text
    • https://8717ace1-8174-44a1-9f98-e7cbf9e9ed94.filesusr.com/ugd/14e3be_3b066c4db5bd4602ba76daeac9f13861.pdf?index=trueIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_b7606944e2b14e878a027e8e4521b63a.pdf?index=trueIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_ea9cc1e817984f00a2103cc040e230cb.pdf?index=trueIn PDF document text
    • https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_440231f35f054367ba7ed25c014decd1.pdf?index=trueIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_7cefe0a71b63420d8e6aade2855f5cc9.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001124f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124F 5272 bytes
SHA-256: ed23e873e095e25911625a78dc96f82827b5666743d7136be0d4db2ad9de861a
font_01_sfnt_off00012434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12434 2280 bytes
SHA-256: 2ae1575376239567e93ecb1e231089b1ad65a0a5b532a59cddbba84e861f8813
font_02_sfnt_off00012ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBD 11408 bytes
SHA-256: 4dede04daee63b5e65cd1f61156d9299d550291f3f2bfe96b881f4251f0084aa
font_03_sfnt_off000155b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155B5 17140 bytes
SHA-256: b1d7ac643541118c1c8fc699ac65ce0f180476c5f1cadbebed8971a345e43540