Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d1b7282c93684d…

MALICIOUS

PDF

87.3 KB Created: 2021-03-24 05:30:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3bb486910011758ad05d6805a125a01b SHA-1: ba9a85c455eefe97be7d849071dfa9fd366aba67 SHA-256: a8d1b7282c93684d0bcdd117a9ddaf830959317760bba8d532c13b9b9a057c1b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'ponafet.ru/award', suggesting a phishing or malicious download attempt disguised as a search result for accounting documents. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further indicates a malicious intent to distribute links across potentially compromised or disposable domains. ClamAV detection confirms the malicious nature of the file.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/award?keyword=buku+akuntansi+keuangan+menengah+pdf PDF link annotation
    • http://gratoram.site/vizio_sound_bar_2.1_user_manualslgu4.pdfIn PDF document text
    • http://rollernefritmassage.xyz/decimal_word_problems_7th_grade_worksheet21shw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_6030a75c5d16e.pdfIn PDF document text
    • http://swiss-gear.shop/gast_vacuum_pump_usesjadkm.pdfIn PDF document text
    • http://vertigoa.online/difference_between_bacteria_viruses_and_fungigm63m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426682/normal_6044daadd1041.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471275/normal_6007dbd3a25d6.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/magejuligukelesukimkai4.pdfIn PDF document text
    • http://togusavek.22web.org/86245957722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366302/normal_6000d283c6c4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zarenubopopo.epizy.com/gezinuzipifesisewima.pdfIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_6802eda363484c4e8a89b47571896524.pdf?index=trueIn PDF document text
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_de58a22dd5ba44d19746618d07c8787e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwafo/absolutely_anything_song_cg5.pdfIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_51f21d72d5b44ef1b1ce009c037d8fbd.pdf?index=trueIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_e11c3af6f48e4a52bbf0bb9fa6392616.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/beyonce_crazy_in_love_bet_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/stcw_2010_manila_amendments.pdfIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_5faf373edbb54ae8b9aaf6c68d76b0df.pdf?index=trueIn PDF document text
    • http://baledur.epizy.com/dell_latitude_e6410_keyboard_not_working.pdfIn PDF document text
    • http://timonuxe.rf.gd/bostitch_multi-_mount_manual_pencil_sharpener.pdfIn PDF document text
    • http://palalujopaxuv.epizy.com/22533874594.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_off00011712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11712 5440 bytes
SHA-256: c4eb40188dc7ff33a478427dc5489e4b293a23257f98b6c475b4fffc8676442e
font_01_sfnt_off0001297e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297E 11104 bytes
SHA-256: 85b374713481b36853176470045ca2a616063a50ef181eada5997ffe7402640d

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