Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f89306bc4a4d28d…

MALICIOUS

PDF

88.4 KB Created: 2021-04-05 06:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 413206dc9e7d197142dda329be491b25 SHA-1: b04b875523f19901189330323c83f6d74cae013d SHA-256: 4f89306bc4a4d28d32ddb3ec9396be62dd5aa785bad492fd0eff37051ff553b5
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to 'baarspo.ru', which is likely used to host a phishing page or download further malicious content. The document body, though heavily obfuscated, appears to reference 'Central intelligence agency act of 1949 pdf', suggesting a lure to trick users into believing it is a legitimate government document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/award?keyword=central+intelligence+agency+act+of+1949+pdf PDF link annotation
    • https://cdn.sqhk.co/ranuvore/SkD02ir/86963993435.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/hcha977/8328327027.pdfIn PDF document text
    • https://cdn.sqhk.co/tadeketoxab/UzREJig/two_dots_above_o.pdfIn PDF document text
    • https://cdn.sqhk.co/bilexodofose/jffRwie/hallmark_channel_subscription_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/CriiteD/flutter_starlight_ant_event.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461205/normal_5fea393529631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_602e092121b07.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/bibJggX/diary_with_lock_fingerprint_lock_real.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/hi0hgqV/kupiri.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepelela/GWjg7uE/a_tribe_called_quest_the_space_program_instrumental.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/Nij2jd4/mr_spy_undercover_agent_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/bumadawab/AqschiS/art_wallpaper_for_iphone_x_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/Xigajgd/gagojasowebatover.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zerepuzuze/how_to_keep_summer_infant_monitor_screen_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94593cb-0e9d-4484-81dd-1bf9204bfc23/how_do_i_qualify_for_sss_maternity_benefit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92e662a0-b646-4f41-8c73-cc1d846d8d95/monster_vape_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/43446282790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d6be57-c32c-47bf-8147-ac6217f59646/mozaxubawokizigane.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/78593043753.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9C 5356 bytes
SHA-256: 0071b6867185427f3796065a46f7563b0fa08deef96b870caeeaba45ebe2f9bb
font_01_sfnt_off00011feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEB 11048 bytes
SHA-256: 0e006428e6db6dcf1e9c3409519fbe2009799331d487d441e398a3b06fb1b915
font_02_sfnt_off000145cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145CD 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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