Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4b5805a7144333…

MALICIOUS

PDF

76.7 KB Created: 2021-03-03 19:16:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2bf5ab943abb28668be51c33ade099ef SHA-1: 029e5a5182c61d267fc2b83bd3bd9ea65d6e1297 SHA-256: 5b4b5805a71443335db37b080bcb6a96170bedbb9e5a442d62a8d7ef5aa649ca
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and by ML classifiers as malicious. ClamAV also detected it as a phishing trojan. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://leonvi.ru/wix?keyword=beowulf+study+guide+2+answers PDF link annotation
    • http://fazejajogavu.medianewsonline.com/zalotodofozijex.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/hgL2je2/28460806180.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/eurydice_play_script_summary.pdfIn PDF document text
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/d49f19928c.pdfIn PDF document text
    • https://cdn.sqhk.co/xenumobavun/gewUUcN/rujenunifugidav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_6009ec419936f.pdfIn PDF document text
    • https://tabuwesajusa.weebly.com/uploads/1/3/1/8/131856124/6dac80b96908667.pdfIn PDF document text
    • http://pegajopakazo.22web.org/teddy_bear_teddy_bear_song_free.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/zunivirupigunakeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_603e72c7e6e58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420470/normal_5fe5a68f6f892.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jusisow.rf.gd/how_to_cancel_planet_fitness_membership_online_reddit.pdfIn PDF document text
    • http://roporuti.onlinewebshop.net/who_manufactures_pioneer_mini_splits.pdfIn PDF document text
    • http://wisubiko.rf.gd/yard_machine_rear_tine_tiller_owners_manual.pdfIn PDF document text
    • http://wedagavuvux.epizy.com/jadopiluzoxuzanes.pdfIn PDF document text
    • http://jinixoxugud.rf.gd/panama_canal_video_questions_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 5452 bytes
SHA-256: 8fd5c0490a2f0d0f34e523e125c28f51f91f0bf009926df863ee6a8c716d08e1
font_01_sfnt_off0001009e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009E 10820 bytes
SHA-256: cee286fd217f6bd9c3b9ee8097fb77fb9f073ae9e150251c9090356ce0242fd9

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