Malicious PDF — malware analysis report

Static analysis result for SHA-256 19da9fe2d613f481…

MALICIOUS

PDF

79.0 KB Created: 2021-03-14 18:30:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 608108a4e251444f104056a3db580486 SHA-1: f08aef01b8f6931a9c91e5688b1686dcd9961732 SHA-256: 19da9fe2d613f481c28900e8309c4c1ea311b31f4e057f2c3c64804f35036b77
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one specifically flagged as a potential lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=spot+welding+machine+specification+pdf PDF link annotation
    • http://kogutojoveso.mywebcommunity.org/paweborumomezose.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/asciidoc_header_footer.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/1630868621.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/17621871237.pdfIn PDF document text
    • http://rakapugijumub.sportsontheweb.net/berkshire_encyclopedia_of_world_history_volume_2.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://muzoxed.rf.gd/jump_force_dlc_characters_not_showing_up_switch.pdfIn PDF document text
    • http://xomesozumifa.rf.gd/57500470534.pdfIn PDF document text
    • http://sejigesenevemi.epizy.com/26747009495.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/sofibuduzelekusokozox.pdfIn PDF document text
    • http://supajiwa.myartsonline.com/95490394053.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/where_to_purchase_a_speed_queen_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/89398407180.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/what_are_contemporary_issues_in_psychology.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/69325881910.pdfIn PDF document text
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_702842f436f3409cbacce26cf34cb417.pdf?index=trueIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_e26489838aa84759a8b1652e65e5217d.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_off0000e9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EA 5456 bytes
SHA-256: ed8674e50747879938473838046723e98167dc543551d40ed1a5ab528e72178a
font_01_sfnt_off0000fc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5E 10720 bytes
SHA-256: 6cc2708bd905a5c7c2554ea30bb4d06174b6f784c1fe9cdc0afdbc67b8d64337
font_02_sfnt_off000120ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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