Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ba8e4b49d7f1a8…

MALICIOUS

PDF

80.7 KB Created: 2021-04-06 08:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1952e54e8512b070773c0ced6bb254d9 SHA-1: 78f8825b36f2a61f2e8c42fc62be91d6a0ac0e08 SHA-256: d8ba8e4b49d7f1a89693c34c1be98e0e6f523679cca672bb88c4cc0d1d0788b8
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to 'Walking dead comic book characters'. No scripts were extracted, but the presence of external URIs and the malware detection suggest it's designed to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://dugedepap.ru/strik?utm_term=walking+dead+comic+book+characters+vs+tv PDF link annotation
    • https://cdn.sqhk.co/rivinodati/dgfqRdC/universe_sandbox_play_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469378/normal_604ef6d6c0d87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415783/normal_60167e7a0e9c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489852/normal_5fc591f516733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_604cf64293c86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420451/normal_5fce1dc9989c8.pdfIn PDF document text
    • https://cdn.sqhk.co/tezejikibus/ieghhcI/answerphone_song_clean.pdfIn PDF document text
    • https://cdn.sqhk.co/legesizas/aheF0hc/83433679584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409405/normal_5fe7fbca03667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392647/normal_5fe42781e46cf.pdfIn PDF document text
    • https://cdn.sqhk.co/bulelovuroga/rzaghhc/migobokujepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505096/normal_6010de513d8e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_60547fa23ab48.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/ihNcugf/3_yellow_classic_cheats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/overtures_traditional_embossed_place_cards_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4866d182-0459-41b6-9ae9-2e943f9c2cb6/39017662512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/003251b3-0e8e-4627-b8c4-3e425e6c3219/official_summer_sport_of_canada_codycross.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/nc_driver_s_permit_test_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/zomotida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c7590e8-3fae-4aa3-8ae4-4620ef6a9766/omron_what_does_e5_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/36074106903.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/the_girl_with_the_dragon_tattoo_author_murdered.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/wigutesepomejiwirozila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4eb42fe-bceb-4f30-a23f-1e35becc3326/how_long_does_it_take_to_fry_a_turkey_in_a_butterball_fryer.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/14361360720.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/24323898816.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_off0000faaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 5632 bytes
SHA-256: 75c8901902fdf1fc7d1ea3cd10f45204b3375b69b52649355c02885dc5976954
font_01_sfnt_off00010db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB1 11536 bytes
SHA-256: 10acd3b7068c2e5e71b33387dcec30fee14140ae9e8e7ae34a570acbcb9aaf03

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