Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0301553d193569f…

MALICIOUS

PDF

78.6 KB Created: 2021-04-10 00:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f6a39a3bd46f925d287487ecbfc6884f SHA-1: 9c280e5ca951c4010b69b1e5229ac1911f2029ad SHA-256: e0301553d193569ff92ae3d25ae9530c8c7340770c3ee62762821b2dde627b06
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs, many hosted on disposable domains, suggesting an attempt to redirect users to potentially malicious or phishing sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a deliberate effort to create a network of links, likely for SEO manipulation or to distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=asus+rt-ac66u+not+working PDF link annotation
    • https://wojebera.weebly.com/uploads/1/3/0/7/130775791/dozimowevunoron-lomalises.pdfIn PDF document text
    • http://pedugubugof.mywebcommunity.org/lei_do_simples_nacional_em.pdfIn PDF document text
    • http://xxlmature.site/visogexixetawilatelaxhla8x.pdfIn PDF document text
    • https://rusuligoxajikug.weebly.com/uploads/1/3/4/3/134399392/9182979f67e63f.pdfIn PDF document text
    • https://xetamoro.weebly.com/uploads/1/3/2/8/132815737/womud-detefiwu-fewejifu.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/bibRhjI/35445472830.pdfIn PDF document text
    • http://nijepatexosanus.medianewsonline.com/carcinomatosis_peritoneal_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/subetudagoli/jeTifjd/3805893524.pdfIn PDF document text
    • https://cdn.sqhk.co/bitanalagep/cd5mY5L/wish_apple_watch_bands.pdfIn PDF document text
    • http://naturaleone.space/49547674978obu76.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/hdBjeBo/mezatifotibakamitaxem.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/Yoytxjh/jam_league_basketball_mod_apk_1._3._9.pdfIn PDF document text
    • http://reestr.site/starbucks_coffee_rate_in_indiaubtio.pdfIn PDF document text
    • http://rogijowop.sportsontheweb.net/visiwafetowazojuxumexaris.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
    • http://riveminigokoxa.myartsonline.com/66584952252.pdfIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_c076672d20544c708142fd723fe364fe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b91874be-73f9-4406-a6ea-a0431cfb7ba6/solution_set_of_quadratic_equation_calculator.pdfIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_9ed859da0ce74051bf7be389d7859193.pdf?index=trueIn PDF document text
    • https://67536400-2f23-40e2-9d3a-36ae3f4dfb8c.filesusr.com/ugd/5312ea_04b8af13bb54419fa118f694e4dead65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f05d92-c056-4cf5-8314-0ed3a7de4f25/forgotten_realms_true_name.pdfIn PDF document text
    • https://0feddc0e-03bc-46a3-a741-45303deff239.filesusr.com/ugd/6ea6a2_281a483c731146078e72d0a4d67688b2.pdf?index=trueIn 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_off0000ea19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 5028 bytes
SHA-256: c2969cd608dea13a76f26e58e0be719a45569188bb4933a8220b5754ff8785d2
font_01_sfnt_off0000fb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB55 10428 bytes
SHA-256: 8c396406f02879e5a2d9f402d6738a188cbf16dff31dba4fa605b528880d84f5
font_02_sfnt_off00011f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F05 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176