Malicious PDF — malware analysis report

Static analysis result for SHA-256 94de73193434614e…

MALICIOUS

PDF

77.1 KB Created: 2021-01-22 13:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c4c4c35d70d0efa3913af9c6ea3ba70b SHA-1: e35568e401aff5d6f81c77961aa17fe4fbc899c2 SHA-256: 94de73193434614ee2cbd742896ae5d907d8ba690f9933ce2f933138d7d67d02
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'bologen.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=juan+de+pareja+book PDF link annotation
    • https://site-1181117.mozfiles.com/files/1181117/anandam_telugu_songs_320kbps.pdfIn PDF document text
    • http://tunizunifegitof.66ghz.com/apache_web_server_windows_64_bit.pdfIn PDF document text
    • https://site-1246633.mozfiles.com/files/1246633/state_voluntary_acknowledgement_of_paternity_form_texas.pdfIn PDF document text
    • https://zanolidades.weebly.com/uploads/1/3/2/6/132695759/ninibufomitig-vagesodoga-fafuno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412758/normal_5ff180712f2d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421940/normal_5ff87de5a433d.pdfIn PDF document text
    • https://site-1174929.mozfiles.com/files/1174929/loud_alarm_sounds_free.pdfIn PDF document text
    • https://wimopoxidiki.weebly.com/uploads/1/3/5/3/135313965/2073167.pdfIn PDF document text
    • https://site-1168115.mozfiles.com/files/1168115/factoring_trinomials_problems_and_answers.pdfIn PDF document text
    • https://site-1166617.mozfiles.com/files/1166617/fisher_common_stocks_and_uncommon_profits.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387036/normal_5ff4d0e4bff92.pdfIn PDF document text
    • https://site-1180537.mozfiles.com/files/1180537/sonimisipizatapiketi.pdfIn PDF document text
    • https://tejifogigevavep.weebly.com/uploads/1/3/4/6/134675995/a861797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_5fe6caec8a472.pdfIn PDF document text
    • https://fekazivijiwawad.weebly.com/uploads/1/3/4/6/134687088/kufivub.pdfIn PDF document text
    • https://site-1174122.mozfiles.com/files/1174122/the_world_of_magic_ranger_equipment_guide.pdfIn PDF document text
    • https://site-1253492.mozfiles.com/files/1253492/acana_puppy_large_breed_feeding_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366358/normal_5ff0bde137729.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bozudob.epizy.com/wifi_calling_software.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_off0000efa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA9 5012 bytes
SHA-256: 3ade6f08e0f5b3fd829581e00f2b0f91b8944df019b6a6ce03afd5beb61562db
font_01_sfnt_off000100c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 11448 bytes
SHA-256: 874e3de3a02ddf50e944f2b32792bdf726bcd75da1810e44e90b6b6d718195c6

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