Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead14b4dfd81b613…

MALICIOUS

PDF

84.0 KB Created: 2021-04-01 07:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 54c406c3cfe44f957266fa356e5ce783 SHA-1: 1040cb1ab51ed085bf77daeb69c23c219cdb265c SHA-256: ead14b4dfd81b6139e039313ca4a197a93d1dc73dcfd2838b2d6951d424d657d
126 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, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the use of disposable hosting for PDF files, reinforcing the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=bullying+que+es+pdf PDF link annotation
    • http://xbet1.fun/hp_p3015_fuser_gear_kitdx4s9.pdfIn PDF document text
    • https://nekatiru.weebly.com/uploads/1/3/2/6/132695473/464079b50a7210a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_60609cd0bf139.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/jowonalufamecbzth.pdfIn PDF document text
    • http://100naturals.fun/rejibotudanupidupajerc0j7.pdfIn PDF document text
    • http://getyourscore.info/402899267213uiwx.pdfIn PDF document text
    • https://demuxovepeb.weebly.com/uploads/1/3/4/3/134311881/walonewix-lojalaki.pdfIn PDF document text
    • http://creditscorefix.info/onn_alarm_clock_directionsmymre.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/flysky_fs_i6_2.4_g_6ch_afhds_rc_transmitter_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471488/normal_5fde11392be3a.pdfIn PDF document text
    • http://romeita.space/nawovomavonug549l.pdfIn PDF document text
    • http://matemepujibad.scienceontheweb.net/26909387841.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/perifexafujovijobaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_6017dbe78013d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387919/normal_5ffd29b0d1387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417406/normal_604bc51705bab.pdfIn PDF document text
    • http://makeyourself.xyz/kojopufap1ty7o.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/245f221a-fc23-464c-8a54-e1e5e6988070/wixino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfbd412-2dab-4ba0-928a-f3fb8427e365/sat_practice_test_3_writing_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cea97ea-2632-47af-b95f-288e6449a6dc/83396528045.pdfIn PDF document text
    • http://ranitirunom.myartsonline.com/33475481282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1e08b3-7501-49b3-8655-dd38fd88a903/como_crear_abundancia_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96f8584-1b3e-4094-882a-892be7a0fab4/dark_souls_remastered_ps5_performance_reddit.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_off0001046c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046C 5180 bytes
SHA-256: 0db86a97e996d0849d53108774c105c6251a2c41acfbe7ca5e1b4d79f9aa0346
font_01_sfnt_off00011631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11631 14676 bytes
SHA-256: ff626bb20fdcb3fc06bee5ce6f48ffa7412cf815810cb060a304caf1f34ee6da

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