Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd86cd72a05f40c1…

MALICIOUS

PDF

106.7 KB Created: 2021-02-27 07:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1b6e0b00461341c2ae6c1a33a76db155 SHA-1: de8edad6a43bfd9a6c4eb9aa61bcc03e47171ca8 SHA-256: dd86cd72a05f40c17f06d4f1fa5f03afb5aae7c316778a8cfcc046163d485439
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to job searching, directing users to external URLs like https://vilenefex.ru/aws?utm_term=mechanical+engineer+jobs+in+indian+government.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://vilenefex.ru/aws?utm_term=mechanical+engineer+jobs+in+indian+government PDF link annotation
    • https://cdn.sqhk.co/sevalaturi/Uibojjk/bavubewuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/pYihrFp/crossing_over_occurs_in_which_stage_of_meiosis.pdfIn PDF document text
    • https://fabebebu.weebly.com/uploads/1/3/2/7/132740756/pejaxulufe.pdfIn PDF document text
    • https://xakanokemuma.weebly.com/uploads/1/3/5/9/135965718/9147096.pdfIn PDF document text
    • http://topepuxabi.iblogger.org/cursos_de_ingls_en_lnea_gratis_sep_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/Vhgijhd/marshawn_lynch_skittles.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/aI0jjgd/anime_hd_wallpapers_1080p_for_android_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/jiL1ief/facebook_whatsapp_business_api_partners.pdfIn PDF document text
    • http://wubosuvim.22web.org/lomatabifovunabamo.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/c8OOggT/36514935374.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/14112343364.pdfIn PDF document text
    • https://segamivudafipem.weebly.com/uploads/1/3/2/7/132740242/6754589.pdfIn PDF document text
    • http://drive4mclaneaustell.com/18389144857io80l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widifusi.myartsonline.com/kisujawa.pdfIn PDF document text
    • http://fufabufitilaf.epizy.com/gambar_animasi_bergerak_lucu_banget.pdfIn PDF document text
    • http://widifusi.myartsonline.com/denon_x4000_ebay.pdfIn PDF document text
    • http://daxevekiwenux.epizy.com/free_indesign_storyboard_template.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_off000165a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165A1 5636 bytes
SHA-256: ef5c1c0dde8e8dbbe97c4e22982311182719ab4cc1a3531e39513a8de5e05e43
font_01_sfnt_off000178b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178B3 11140 bytes
SHA-256: c186921081fec1801b7b8f73afb05ebc933775a15f78ad668867ab8a31095bc5

Open this report in the interactive analyzer, or submit your own file for analysis.