Malicious PDF — malware analysis report

Static analysis result for SHA-256 303460e0062d3923…

MALICIOUS

PDF

91.5 KB Created: 2021-04-06 02:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31f907994977e1c02172ac2729fabeff SHA-1: 1845bab63b0e6a22f307d52dfb9aa418adef47fa SHA-256: 303460e0062d3923949d6a76fbda4144bfaf75e711d356b5bc443449682df9f4
116 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. The SE_CALLBACK_LURE heuristic indicates the document is designed to trick users into calling a phone number, a common callback phishing technique. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it may lead to further malicious activity or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://bologen.ru/aws?utm_term=stephen+king+if+it+bleeds+release+date
    • http://bonmarket.site/36477808746ohbgl.pdf
    • https://cdn-cms.f-static.net/uploads/4393186/normal_6049812633b3f.pdf
    • http://wamuwosola.mygamesonline.org/32159612895.pdf
    • http://ionatr.fun/49103239460uh7ls.pdf
    • https://cdn-cms.f-static.net/uploads/4372967/normal_600aa51f0c639.pdf
    • http://bagerisevi.scienceontheweb.net/characteristics_of_management_information_system.pdf
    • http://ru-1.casa/5044300475n5dq8.pdf
    • http://50offstore.info/kekutufib13eih.pdf
    • http://detonicufficiale.website/radiation_biology_bookskbbbn.pdf
    • http://lorozetuwivu.medianewsonline.com/world_map_blackline_printable.pdf
    • http://gdztut.com/how_to_reset_lg_air_conditioner_wifiuj11l.pdf
    • http://securityverifiedservices.com/metals_handbook_9th_edition_volume_1xd3lq.pdf
    • http://natlab.ru/canon_av-1_camera1xrjp.pdf
    • http://sayseedokg.com/divina_commedia_infernombg1i.pdf
    • https://static.s123-cdn-static.com/uploads/4480591/normal_5fde05ab2529d.pdf
    • https://cdn-cms.f-static.net/uploads/4497666/normal_601fd5758a6c6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wikurixobelu/acdsee_pro_10_free.pdf
    • https://s3.amazonaws.com/pajeriramal/24475899347.pdf
    • https://s3.amazonaws.com/tokudapele/detroit_become_human_carlos_android_actor.pdf
    • https://s3.amazonaws.com/rekawexuretowo/50430587877.pdf
    • https://s3.amazonaws.com/tokafanawa/number_line_worksheets_for_grade_5.pdf
    • https://s3.amazonaws.com/buponuwebi/vajovivotikididezev.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_off000124dd.bin
1dd6505b16fc8db4e309effcc016bacbfa8ebbdfe736676b76b526d847ca7d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124DD 5608 bytes
font_01_sfnt_off000137df.bin
ad9a1dc93ee16dd5550b1069ef18881c6c688d4173612dafaca30afbf8ce9053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137DF 12072 bytes

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