Malicious PDF — malware analysis report

Static analysis result for SHA-256 291c47e0638a22d8…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 02:04:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0eaa2c6d3ad7f183010c3818c836b6f3 SHA-1: b872176d5abc17c91054d1e628f54ad48c926b11 SHA-256: 291c47e0638a22d889d68724a6795aa4027885a53e9c07b415b750e3f7cd6fdc
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of embedded URLs suggests an attempt to redirect users to malicious sites.

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
  • 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://resalured.ru/wix?keyword=chuck+dukowski+net+worth PDF link annotation
    • http://4d-5d.com/quality_engineering_using_robust_design_phadkem037e.pdfIn PDF document text
    • http://dfwshootersupply.com/motivational_speech_ideas_for_highschool_studentsemhvi.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/action_sheet_in_swift_4le3kt.pdfIn PDF document text
    • https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/8f1033d5.pdfIn PDF document text
    • https://gijenufojuli.weebly.com/uploads/1/3/5/3/135335104/5705598.pdfIn PDF document text
    • https://jazigibebegada.weebly.com/uploads/1/3/1/6/131606339/rapalonorusop.pdfIn PDF document text
    • https://tofixotiz.weebly.com/uploads/1/3/4/6/134621190/korovonatap-wemisotofunub.pdfIn PDF document text
    • http://levantegroup.net/47236257316obona.pdfIn PDF document text
    • https://fitarerak.weebly.com/uploads/1/3/5/3/135313257/7197959.pdfIn PDF document text
    • https://lafadulow.weebly.com/uploads/1/3/4/5/134591129/mofevabanigubo_zelosise.pdfIn PDF document text
    • http://maslovauto.ru/what_is_the_net_worth_of_top_1_percent_in_indiazxiw6.pdfIn PDF document text
    • https://faworufobideped.weebly.com/uploads/1/3/2/6/132682851/d163c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_d5baed6fab0e435c94c1118646d3b12f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc99a57-de4f-4afd-8af7-2d42e1872981/51725097069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f6a63ae-3dc7-4e51-8b6e-347e87d33387/fegazilesid.pdfIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_efacd4a78e3943eeab598a0348411186.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/document_checklist_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/yokogawa_centum_vp_training_manual_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/letra_de_la_cancion_stressed_out_en_ingles_del_titanic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c74cd1-16ae-48e1-834f-436f178dbdcb/diary_of_a_wimpy_kid_double_down_book_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/amasis_font_free.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_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 4848 bytes
SHA-256: 750ee92127fee3a380c5f1278dc419832e4c335b5aae674bfb0524791817fe92
font_01_sfnt_off0000fe2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2B 12744 bytes
SHA-256: 794e6ca850cb61131af6d066ca4999aa0028a2d6ea38455c917f42b369d2f2ad

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