Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c3155ea30feec3…

MALICIOUS

PDF

72.9 KB Created: 2021-03-22 21:27:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1cb69541bf5ae98293cfdeef8e60be8 SHA-1: 7931796cd9641db9b3d64e59fc1a589a16d93b6e SHA-256: b5c3155ea30feec3a7e8aba7569d2739018f3893e76d8c41c75fd85b14cebfe2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing sites. The heuristic PDF_SEO_LINK_FARM indicates a large number of generated SEO links, suggesting an attempt to drive traffic to potentially malicious or scam-related content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lozipotod.ru/wix?keyword=bucks+vs+celtics+live+stream+totalsportek
    • http://mufutekuson.getenjoyment.net/what_is_the_etiquette_for_mother_of_the_groom_dress.pdf
    • https://cdn.sqhk.co/vakolitakap/if3jghc/pawonurupudujubufufijini.pdf
    • http://vizilamu.22web.org/31176951055.pdf
    • https://zepafasamog.weebly.com/uploads/1/3/4/3/134361306/rujetulidap-bolizop-litamunev.pdf
    • https://cdn.sqhk.co/taguvomir/hPLWgfg/29419739402.pdf
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/dirakuvibok.pdf
    • https://cdn.sqhk.co/fuvazuginu/XjjIieH/urban_dictionary_offline_apk.pdf
    • http://vigimakuzuzuri.iblogger.org/benetikudapokinexejo.pdf
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/4546870.pdf
    • http://sevezor.scienceontheweb.net/covid_19_news_michigan_stay_at_home.pdf
    • https://cdn.sqhk.co/mofijovelu/jbwZice/79963327511.pdf
    • https://julamukipupa.weebly.com/uploads/1/3/0/7/130739907/8669404.pdf
    • http://midikakuvekume.mywebcommunity.org/pisciculture_hors_sol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fejififimaketo/serta_slim_adjustable_base_manual.pdf
    • https://s3.amazonaws.com/wipotegadodorek/the_spiritual_man_judges_all_things_kjv.pdf
    • http://duribolatajofa.atwebpages.com/los_cinco_lenguajes_del_amor_prueba.pdf
    • https://s3.amazonaws.com/fexuror/batman_game_free_for_android.pdf
    • http://kejarajavamoge.epizy.com/freelance_contract_agreement_template.pdf
    • https://s3.amazonaws.com/gomaxod/3d_photo_slideshow_maker_free.pdf
    • https://s3.amazonaws.com/midipes/anjali_anjali_pushpanjali_song_in_masstamilan.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_off0000dd21.bin
fada79da9c1eb3adc8899cc566ec5caf25456b3cf313e403a0dc723298e8405d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD21 5252 bytes
font_01_sfnt_off0000eef1.bin
632017dc73ef1fcdaaa9974af2a8ea6dede83f49b70b92e027df91d05d9a5904		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 11056 bytes

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