Malicious PDF — malware analysis report

Static analysis result for SHA-256 1273c90fe13a7ea4…

MALICIOUS

PDF

76.5 KB Created: 2021-04-05 01:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1fb1173e851b47dd7c80c8c070d24187 SHA-1: 9f963ce15debf64b1aaa019b023ddc9b7e22071a SHA-256: 1273c90fe13a7ea44ae76a5e0e2abb2c153065fa1788158e96e76457cb486c94
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/wix?keyword=monkey+madness+2+guide PDF link annotation
    • http://fomijegi.mypressonline.com/bacteriology_laboratory_manual.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/burger_king_get_apple_pay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_6011da0ece8e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383149/normal_5fe142f61711c.pdfIn PDF document text
    • http://fuxuxixigu.scienceontheweb.net/nasesiluvonanipabe.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459941/normal_606a387f03d7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_60259cd28b31c.pdfIn PDF document text
    • http://igcopyrightforhelps.com/979141478797wfn1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366639/normal_5ff6623375210.pdfIn PDF document text
    • http://vinnipoh.space/simijevuvibukisoforinkzfze.pdfIn PDF document text
    • http://podjem2.club/39665944442nm9hw.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/fender_hot_rod_deluxetm_112_enclosure_lacquered_tweed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_600e5a4292b65.pdfIn PDF document text
    • http://oneitstore.pro/stuart_wilde_infinite_selfzhda0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/xedovaxubinofujef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4eb947-1aad-4f73-a84b-8a52b0dafce9/20949886755.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/sabopuwegokufogufed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53909e6-4bde-42f0-8817-2d3b46aeec74/big_green_egg_table_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/blue_iris_mac_alternative.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/what_station_is_newsmax_on_spectrum_cable_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1146e372-1fdd-4acb-b94e-4bae58975cd3/john_hopkins_antibiotic_guide_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/revoxogenonujedeziwokosol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec3cc34-e715-4473-a01c-f1dbc40f39a2/2003_jeep_liberty_4x4_tire_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7caafbc2-d8b5-4e54-a48d-76f54a2b7b65/how_to_create_a_probability_distribution_in_statcrunch.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_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 5320 bytes
SHA-256: 717e55337a2cdd3517b0f7ecebc647a5ec0f3b47ee17a2fec9e083fa7d5489cf
font_01_sfnt_off00010020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10020 10844 bytes
SHA-256: a0f27c585665c302680c4c5b7e2192f4919c585deeffbda5fa222cb15172812d