Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9c96a513629e94…

MALICIOUS

PDF

122.9 KB Created: 2021-03-28 14:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef32460ee22bd17dbd1f943deeeda6cb SHA-1: c196d9407d45c11d715bf74e11a63cd34691ab9a SHA-256: ed9c96a513629e9442c7705fe44be005b3db4693d25646fbc8c5f1a2b378a30c
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 manipulate search engine results. The document body, though heavily corrupted, suggests a lure related to a popular TV show, likely to attract clicks. The presence of ClamAV and ML heuristic firings strongly indicates malicious intent, specifically phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=ang+probinsyano+april+25+2017+full+episode
    • https://cdn.sqhk.co/bipadifudame/jcidEjE/torn_labrum_shoulder_pain.pdf
    • https://cdn.sqhk.co/sadebupunen/ijniggc/pocket_tanks_deluxe_mod_apk_download.pdf
    • https://cdn-cms.f-static.net/uploads/4490001/normal_5fd5f96f935d1.pdf
    • https://cdn.sqhk.co/gepumenujeme/egsghhi/redidateloze.pdf
    • https://cdn-cms.f-static.net/uploads/4473645/normal_605e1f6d7f1f8.pdf
    • https://cdn.sqhk.co/sedazozesufu/8ieMEFJ/finger_slayer_game_download.pdf
    • https://cdn.sqhk.co/sujutowupolu/zhdvPid/zubewute.pdf
    • https://cdn-cms.f-static.net/uploads/4491410/normal_5fd932549f4b2.pdf
    • https://cdn.sqhk.co/supajoni/7mf56ib/61203643404.pdf
    • https://cdn.sqhk.co/teduwugevoki/expighj/dajepajokitoxiterudik.pdf
    • http://miwasigal.mywebcommunity.org/contrato_de_alquiler_bolivia.pdf
    • http://mudikovarew.mygamesonline.org/kindle_format_conversion.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://deroselewem.epizy.com/car_wala_cartoon_video.pdf
    • http://nofugodevi.rf.gd/employee_form_sample_malaysia.pdf
    • http://xazulagevam.rf.gd/zimsec_a_level_chemistry_syllabus_2020.pdf
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_7485c1dda7a348509c30f20476fd2664.pdf?index=true
    • http://kepagewav.atwebpages.com/bus_schedule_161.pdf
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_e3f5aa2907854506a7788a8e3ca38577.pdf?index=true
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_1d9d0daafc48417f8ceb69515aca6a5a.pdf?index=true
    • http://lijazujarakowom.epizy.com/half_life_word_problems_worksheet_with_answers.pdf
    • http://fuxedoparadob.epizy.com/xumapulof.pdf
    • 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_off0001a484.bin
1635e3e5daf424d6939398302da9563fadf75c23c0ad820eb78802f1cebdcb29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A484 5968 bytes
font_01_sfnt_off0001b8fb.bin
eee3c3fc9a2bdf7cd202029196caa747b6a34e6c5afdb96e284cdaf33c45775a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8FB 10840 bytes

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