Malicious PDF — malware analysis report

Static analysis result for SHA-256 65592b48c9c07fbf…

MALICIOUS

PDF

84.2 KB Created: 2021-05-13 11:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fbae543edce16832d8c9cafa8672d207 SHA-1: e4bc95a2ffd73eccd57f52be0cdc06300e56d9a5 SHA-256: 65592b48c9c07fbf1a573e37b8ea60817ecc35ef5074ab76344405a001180696
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to disposable domains and are likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to weighted blankets, which is a common tactic for phishing and scam operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=how+to+use+your+weighted+blanket PDF link annotation
    • http://retamos.mygamesonline.org/where_can_i_buy_a_christmas_tree_for_cheap.pdfIn PDF document text
    • https://meverelalopabij.weebly.com/uploads/1/3/4/1/134108836/xusof.pdfIn PDF document text
    • https://xabisemegebo.weebly.com/uploads/1/3/4/4/134491474/2946128.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/239650.pdfIn PDF document text
    • https://zanasebumafuwaj.weebly.com/uploads/1/3/4/8/134899829/4072849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_6052f9d33c6a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450434/normal_6067603ba89f5.pdfIn PDF document text
    • https://warazafipa.weebly.com/uploads/1/3/1/3/131381481/7834b.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/77620476235.pdfIn PDF document text
    • http://govuled.mywebcommunity.org/features_of_romanticism.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/reliability_engineering_nptel.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/5516eafd-bd6c-480a-b6b4-6c96c490130a/riviwatosidofabukudot.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/islcollective_answers_german.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4463de9-c649-4e44-9890-bc486bf45f89/pelipok.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/99538683703.pdfIn PDF document text
    • http://xutenasejubibe.atwebpages.com/wajewevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e90db2-c506-4aa2-9312-eb60ae534e85/does_playonmac_work_on_catalina.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/autodesk_dwf_viewer_6._5.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/fleck_5600_parts_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/wild_horses_natasha_bedingfield_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8a2b50-ca0a-4c85-aa45-2e9f29300e71/safufifadixebenekimu.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_off00010922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10922 5444 bytes
SHA-256: c7dba728773ab2ca64e13cc3e0fa54a1774a515bb10e9b4780ab61d243aa51fd
font_01_sfnt_off00011baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAF 11236 bytes
SHA-256: bd571c89a8d6e413108e367e31f2847fb54270375bec512d4cba68d6649ff367

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