Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20a51ad94dcb37e…

MALICIOUS

PDF

85.3 KB Created: 2021-03-18 00:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0488c4648603615d73a441cbab2bba15 SHA-1: 7145ab4d0b3f3e81f4c0ba0ec08c3bb5e421bf3b SHA-256: a20a51ad94dcb37ea71c0840e4a06219597df1f388206f0d712664d93768b008
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'bologen.ru', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated, but the presence of the external URI and the overall detection strongly suggest a malicious intent to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=5.+s%25C4%25B1n%25C4%25B1f+b%25C3%25B6lme+i%25C5%259Flemi+testleri+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4527747/normal_602709d2e8bb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488329/normal_6042e8a079705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401982/normal_60527c84afcb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494452/normal_5fddd8807336d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427077/normal_60100c5664a41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500895/normal_6029fcf91f5a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458833/normal_602e6635b50f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_60515583a597c.pdfIn PDF document text
    • http://spiritstudio.ru/how_much_is_double_orange_chicken_at_panda_expressrzecv.pdfIn PDF document text
    • http://dress-russia.ru/19493531953jycwx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460045/normal_60434f44704ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_60162cae8c5bf.pdfIn PDF document text
    • http://goossyy.online/how_to_use_stealth_cam_card_reader_for_iphoneh28nq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473023/normal_603ebf19f0a94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/65043604-1a69-4f3c-845f-a4722735feef/ciaphas_cain_hero_of_the_imperium_tv_tropes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc5e95e7-068a-4a23-8a23-fac395c33ec7/miller_bobcat_225g_plus_welder_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/free_inventory_template_for_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe526634-889c-41b6-b6de-8da2fc351187/does_costco_have_tech_support.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/53207909540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de825b03-9e97-476e-a875-eef4e8aff3c5/penny_stocks_to_watch_asx.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/al_quran_bangla_offline_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/brother_hl-3170cdw_drum_stop_error.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44A 5596 bytes
SHA-256: 8b0448b01df3e4c113237fa4b49feffd93dea01fd0600c80c3e449100dafe63c
font_01_sfnt_off0000f67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67A 9096 bytes
SHA-256: 907084d6cb36514f86295f54d695a787a93e5d70730aba75432c8d7da86e3da8
font_02_sfnt_off0001090e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090E 12352 bytes
SHA-256: c989925b56b71467da3e734fefe54fd9ffeb4d21b25b2ed5a5d02a1cc67a8769
font_03_sfnt_off00012f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8F 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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