Malicious PDF — malware analysis report

Static analysis result for SHA-256 154e767422eecd75…

MALICIOUS

PDF

100.8 KB Created: 2021-02-15 22:54:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2e5d589ffb9d3f4bc580248d621c941e SHA-1: d39f636455201b164a0a144a7e2387a69ce05520 SHA-256: 154e767422eecd75d19c195e77e5b57652fdefe4cdad1962ccb41f02a75b4f87
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary one leading to 'seumenha.ru', likely serving as a lure for users interested in the deceptive topic of 'drunken boxing'. The PDF's structure and the presence of many links suggest it functions as a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=how+to+learn+drunken+boxing PDF link annotation
    • https://cdn.sqhk.co/jirudumom/giajdjz/current_carrying_capacity_of_copper_cables.pdfIn PDF document text
    • https://cdn.sqhk.co/diridenafa/gjuihlj/gareth_bale_wallpaper_hd_celular.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420248/normal_5fe7bd4ba72b3.pdfIn PDF document text
    • https://cdn.sqhk.co/fusureviweki/4iaoPgi/xusadaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410714/normal_5ff34dc66e5fb.pdfIn PDF document text
    • http://xozanos.iblogger.org/13154747289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_6025e58a3f66a.pdfIn PDF document text
    • http://xemuzaxu.22web.org/wrong_turn_english_movie_all_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/VjgSiba/jizibujoxisijar.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/cQeqnef/vureviwoteb.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/ig2MUij/happy_birthday_cake_photo_editing_online_with_name.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/chgjbVH/19706185420.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/wigvhhZ/puvozodel.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/mrhioaN/40470852172.pdfIn PDF document text
    • http://nodozavi.iblogger.org/boiler_efficiency_calculation_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/18835486399.pdfIn PDF document text
    • http://nigugolesaxof.rf.gd/evidence_based_practice_in_nursing_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/fajerizagosavanavanu.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/71789172571.pdfIn PDF document text
    • http://zinowor.epizy.com/89979126418.pdfIn 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4D 16616 bytes
SHA-256: 99ad686da90fd1ad3c5d555f87e304d4ed6471d487abb7ed44a00e09e4691741
font_01_sfnt_off00013ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA5 5024 bytes
SHA-256: 8e1d7f15a4b62cf2630c6995d6e8acc13fa55ff3c2878ff43ff86c6c33e6cb49
font_02_sfnt_off00014fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD5 12108 bytes
SHA-256: 6a9cf4ea78900d85f8c816cd07b3368d35c887b3367536e17690126f9bea5366
font_03_sfnt_off00017735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17735 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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