Malicious PDF — malware analysis report

Static analysis result for SHA-256 2343765f163d4bac…

MALICIOUS

PDF

80.1 KB Created: 2021-04-11 17:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5924d85bea825af210171426102691b9 SHA-1: d87750785335a8f5970f40a58c2e02e53e1ad2ce SHA-256: 2343765f163d4bac0aaec1cad56bae58d8ea686cb7051647da0a6fc5ca4a3d8a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=tacky+the+penguin+characters PDF link annotation
    • https://jasefeneg.weebly.com/uploads/1/3/4/4/134489721/xubav-norujafofuduf.pdfIn PDF document text
    • https://logutidukikov.weebly.com/uploads/1/3/1/3/131380383/wanarutujakap_xaxupas.pdfIn PDF document text
    • https://bawiduzepafa.weebly.com/uploads/1/3/4/5/134597734/7838471.pdfIn PDF document text
    • https://mafeguviwu.weebly.com/uploads/1/3/1/4/131407057/0a5df22062d.pdfIn PDF document text
    • http://samelike.site/psychrometric_chart_for_engineering_thermodynamicsu6l0t.pdfIn PDF document text
    • http://acgmgroup.ru/acronis_drive_monitor_softwarer28vp.pdfIn PDF document text
    • http://goodnatural.space/zuzifu6s0zx.pdfIn PDF document text
    • https://rusenudiwupelor.weebly.com/uploads/1/3/4/7/134704890/xofowilavulom.pdfIn PDF document text
    • http://idealicaitalia-official.site/mt_mi_tn_di_chuyn_trong_3dmaxdys83.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/5d3390a69b.pdfIn PDF document text
    • https://dawejiji.weebly.com/uploads/1/3/4/5/134505451/2686101.pdfIn PDF document text
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/susuxusaxi_jitavonefuzuviw.pdfIn PDF document text
    • http://13millions-warzone.store/50202172540mg0fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_9ed8c9ecefdf429bad4ce10ca1e20ec4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/m_audio_fast_track_interface_driver.pdfIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_d9ccf61eed034f17aacb6419d0fe369f.pdf?index=trueIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_c7752254ca724f77b682fd2bef4a737a.pdf?index=trueIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_65e7f6aac0c34c388893c91fdffbccd6.pdf?index=trueIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_a8bfecd55b034b49813e3cc39db6b1b9.pdf?index=trueIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_ab05ff319a9a40439ab78a901a5d5774.pdf?index=trueIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_27639f5a87bd492cbc371579f5d8a3ca.pdf?index=trueIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_14768d98e69b42ff81c705e0f9df3dd4.pdf?index=trueIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_fdf136f2b0d1451b8ac48162877848f6.pdf?index=trueIn PDF document text
    • https://7b806e58-2e0f-4c22-b5e1-e0f71c4d6e86.filesusr.com/ugd/8da65f_412a2865c77a4327910de8b8a3237bbb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/papuja/e-_bildirge_bavuru_formu_nasl_doldurulur.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_off0000fa1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1E 5276 bytes
SHA-256: d2c8955b26a38b3828a982bfdec88a6c59d8943426060fc6b3cc1c266cab11b5
font_01_sfnt_off00010c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1E 11104 bytes
SHA-256: 3d09ea564a73bfe7427132b5741b3749745587d5f4dd77d376b31c4dbeb5037d

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