Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4f2c2213d6c29d…

MALICIOUS

PDF

86.4 KB Created: 2021-03-30 01:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1a1121844f1412faf690a5827df341a5 SHA-1: 62c5a7cc86c81f8b855fa83e7ee585d5688a16d7 SHA-256: 1e4f2c2213d6c29dbb8ee58cad2d82466eadede1e202cdaf6d00c18bd87040a9
244 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing a large number of external URLs, many of which point to disposable hosting or redirector services. This suggests an attempt to manipulate search engine rankings or to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or redirection tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wix?keyword=palindrome+worksheet+for+grade+3 In PDF document text
    • http://bibuwobu.22web.org/zomimabezegifusuwewi.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/9he9xlb/joraxefibamobiwiziwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413978/normal_5fd0c3f7751ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379605/normal_6050e79066c4b.pdfIn PDF document text
    • http://xusatekekosigi.iblogger.org/hillsong_worship_songs_mix.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/iicxT38/juzijanikixukikip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489052/normal_5fe3b95e21e48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488316/normal_600b773e6b7a5.pdfIn PDF document text
    • https://cdn.sqhk.co/lutakakijuro/eQqXJic/injustice_gods_among_us_mobile_coin_glitch.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/chaE5FY/fejefubixifozodonivawun.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/ijgg3he/64264864266.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/4kmbCYO/love_letters_for_girlfriend_to_impress_her.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/ighmxIP/pinaven.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/oJvjhtZ/dog_runner_walmart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sezulezaba.rf.gd/tafun.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_01da2c0ebf5d4bdb811630ef48a0fff6.pdf?index=trueIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_1a2cd064b4a84e89a0c5bab8cd750fea.pdf?index=trueIn PDF document text
    • http://nazonuretowu.epizy.com/67978431338.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/gps_94_app_answers.pdfIn PDF document text
    • https://8b1d1a20-f0f3-43d5-aeb5-704ac988d6c7.filesusr.com/ugd/9dbc1d_9fb6d1428a184bde9b0225f220a85e83.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/zafepisut.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_42bde86e1b474f4db4f2a5f790b01b56.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/35831839410.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/xupekeduzasug.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 5644 bytes
SHA-256: cea05f578ec7320dea6ee31309fdf359f52510a9113aea42a59243f1d62223c3
font_01_sfnt_off00010b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4C 12240 bytes
SHA-256: 2ad382dfd1fb166b076a3b9e76268c004b81d873be6c8639a172b479b53d4fda
font_02_sfnt_off000134d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D1 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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