Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ad94f05fb4a20c…

MALICIOUS

PDF

86.1 KB Created: 2021-05-10 03:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e5aa00bd01689f3feb279f3dc546f99e SHA-1: 338de623aa0a21b3b013af42786c54d01b0e53fc SHA-256: 37ad94f05fb4a20c95c9f8a1c6d9b7f3e9537ae03916ae7ea7aa640704baf65a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a phishing or malware distribution scheme. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a deliberate attempt to create a link farm on potentially malicious hosting. While no scripts were explicitly extracted, the presence of external links and the ML classifier's high confidence score suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=head+first+java+2nd+edition+pdf+download PDF link annotation
    • http://ttttrrrr.space/90568259590agrr2.pdfIn PDF document text
    • http://donbetosstreettacos.com/walmart_grocery_delivery_ebt3vnsq.pdfIn PDF document text
    • http://prizinsta24.online/95995754425t6ikz.pdfIn PDF document text
    • http://decideyouself.fun/bamboozles_word_puzzles_with_answerspi0qr.pdfIn PDF document text
    • http://okrasote.info/bogoh_kasaha_mp436fe0.pdfIn PDF document text
    • http://copyright-supporthelp.com/4_pics_1_song_level_20_wind49q28.pdfIn PDF document text
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/19ba16f.pdfIn PDF document text
    • https://momiweporav.weebly.com/uploads/1/3/4/7/134745900/muraxewosurita_tobumiwem.pdfIn PDF document text
    • http://richmaya.site/intonation_exercises_worksheet4hauy.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://uploads.strikinglycdn.com/files/f1301a34-f2c9-411e-bc4b-e88778fede2e/sifegidubuxag.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/33421499326.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_03a682738af0452d980a9a253b5e693a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widuxade/98575781153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6dc3da-8fdb-48ab-955c-9127935a41d4/84407595538.pdfIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_6b829b31bd534cadba137b0ca9673e84.pdf?index=trueIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_616a358635f6422886d39e4fb61ea601.pdf?index=trueIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_99d2ff0ed83245ad9568a8ce795eb141.pdf?index=trueIn PDF document text
    • https://a72a04b1-e5b5-4d9d-bdd8-34e053c51a64.filesusr.com/ugd/9c50a8_fc13a20e77664099ac824d2e31978bd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/537e6a78-dda0-4f3a-8491-081d16bea87b/new_testament_timeline_poster.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_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 5144 bytes
SHA-256: 12f31281005ba92120efacda4020a7a7af8409966434999f67b7ac6c6048fe11
font_01_sfnt_off000107d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D1 16324 bytes
SHA-256: d0c2fd492e60549696743edfc3947e4e6ab64827c91d45f1e407ab63a314df2e
font_02_sfnt_off00013aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.