Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd10bf9fabf3142…

MALICIOUS

PDF

84.4 KB Created: 2021-04-08 00:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9814137f91406b05eb91c7a68b46b52b SHA-1: a87a5ad14b1e908c88869cdcb1e89bbbfafdd441 SHA-256: 8bd10bf9fabf3142842bcb419cf6fb217dadd5ee2ec1843ef735b48aef6a9f66
184 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirectors and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content, likely leveraging a PDF exploit or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=principles+of+athletic+training+15th+edition+pdf+free+download In PDF document text
    • http://eushopvmn.site/ruvoxamudewejila7uioy.pdfIn PDF document text
    • http://difafaso.22web.org/ncert_exemplar_book_class_11_biology.pdfIn PDF document text
    • http://agent-ritual495.online/sugetakamamavedorifug6zmhu.pdfIn PDF document text
    • https://zujakeme.weebly.com/uploads/1/3/4/0/134041616/mazapazox.pdfIn PDF document text
    • https://kigimijufofudiv.weebly.com/uploads/1/3/5/9/135977026/e1fa81c9.pdfIn PDF document text
    • https://vifozafep.weebly.com/uploads/1/3/1/4/131407061/poviwojutufefuve.pdfIn PDF document text
    • http://bebosebe.66ghz.com/batman_returns_1992.pdfIn PDF document text
    • https://xibatelilon.weebly.com/uploads/1/3/1/6/131637149/4c31939fcee.pdfIn PDF document text
    • https://sasujenag.weebly.com/uploads/1/3/5/3/135337218/03687c956273dd.pdfIn PDF document text
    • https://mudikelupiviw.weebly.com/uploads/1/3/5/3/135300608/gisowexobinev_levoj_xeginebeva.pdfIn PDF document text
    • http://xuxesuvetazu.22web.org/44557440840.pdfIn PDF document text
    • https://wudemivezetuf.weebly.com/uploads/1/3/4/3/134318680/sizosupazigar-gakikiserobusa.pdfIn PDF document text
    • http://sfr-webmail.com/4695988129247c21.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/zubati.pdfIn PDF document text
    • http://devlp.design/menegoberuxilakamemofexayrlk0.pdfIn PDF document text
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/3841df5090.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifureboriva.epizy.com/ayo_n_teo_rolex.pdfIn PDF document text
    • http://jopinewo.epizy.com/99_polaris_scrambler_400_specs.pdfIn PDF document text
    • http://katezoluvezile.epizy.com/havana_piano_sheet_music_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733b875f-6520-49e7-adfc-2c50201526e0/how_to_replace_ignition_switch_2007_jeep_grand_cherokee.pdfIn PDF document text
    • http://vodunoku.epizy.com/difutodixasurodigogewugiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0061f26a-4fcc-474c-92a5-2d88487c45a5/venn_diagram_practice_problems_with_answers.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_off00010957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10957 5684 bytes
SHA-256: 27f84a19edde265f88da328d49393f6ce91dcff6916b36a37dda08b7a73d97a3
font_01_sfnt_off00011cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC1 11640 bytes
SHA-256: 5d507a0f604a61333140bdef466f047ba3357fa3a9d93c4b71072c1585f5811e

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