Malicious PDF — malware analysis report

Static analysis result for SHA-256 a523e2e0f7f0d0c4…

MALICIOUS

PDF

78.1 KB Created: 2021-02-28 06:43:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba4fe171e5fbc751acc842c2a37a879b SHA-1: d2f7d318b8bf914802acc9141ff5c6ccb8db6824 SHA-256: a523e2e0f7f0d0c41c4924e95084da97cdf235c40c8cb044656a62e6020daf77
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to fitness, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://dafemum.ru/strik?utm_term=strength+training+workouts+for+weight+loss
    • http://nowukusox.mypressonline.com/givavexawoxe.pdf
    • http://mutujejeturuduf.medianewsonline.com/39341511483.pdf
    • https://lujovimujesami.weebly.com/uploads/1/3/4/0/134019161/d8e3095990ac9.pdf
    • https://wilemixi.weebly.com/uploads/1/3/0/9/130969959/1464666.pdf
    • http://dilawiputonu.mypressonline.com/hp_officejet_4500_service_manual.pdf
    • http://zugapuvu.mywebcommunity.org/lamufopu.pdf
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/f64da.pdf
    • https://polabobaxadujo.weebly.com/uploads/1/3/4/7/134775235/83c696ea55ee.pdf
    • http://tavafotuzefox.sportsontheweb.net/marley_and_me_book_characters.pdf
    • https://radefikifuru.weebly.com/uploads/1/3/4/7/134723330/kuxuminatetaw.pdf
    • http://xizesagig.iblogger.org/janapada_geethalu_ing_audio_songs.pdf
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/f60265f2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tuninedup.epizy.com/oklahoma_drivers_license_renewal_cost_2020.pdf
    • http://benobex.epizy.com/29839613467.pdf
    • https://s3.amazonaws.com/tawovojo/latest_horror_movies_hollywood.pdf
    • http://mukanebesiva.atwebpages.com/guitar_songs_for_beginners_electric.pdf
    • https://s3.amazonaws.com/dowavelaxam/cameroon_intelligence_report_news_today.pdf
    • https://s3.amazonaws.com/nefunupu/kikekumudewudaked.pdf
    • http://teluroluxeterez.myartsonline.com/gy6_150cc_performance_parts.pdf
    • http://bomemab.epizy.com/bivasorivafi.pdf
    • http://liraperuwuw.atwebpages.com/how_to_remove_lg_refrigerator_light_bulb_cover.pdf
    • https://s3.amazonaws.com/didowugorokirug/frigidaire_refrigerator_replacement_parts_door_handle.pdf
    • http://liraperuwuw.atwebpages.com/podusubuxumozow.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_off0000f4cc.bin
c3e9f69940eeceb12c4817e5e444b4bd63ff5a16bb1e45db67026267d60ca6b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CC 5288 bytes
font_01_sfnt_off000106d8.bin
a3e5ff2073c0f8afe135dfca79982e6a3148ce614ecbbffea574ae9b322c8719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106D8 10412 bytes

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