Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b22325ce8ac38b…

MALICIOUS

PDF

98.9 KB Created: 2021-03-29 06:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e32a7d9164ec8abb08fdaddbf825c93d SHA-1: afb36bf1ca1af3f20f73ae046d031ed5a1e14d85 SHA-256: 44b22325ce8ac38b9b6a83bab8c33ab700fcd628b30bbbe505fcce0d95176621
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'resalured.ru' and a query parameter suggesting a lure related to job openings. The PDF structure and embedded links indicate an attempt to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/123?utm_term=guidewire+job+openings+in+chennai PDF link annotation
    • http://nanonewe.scienceontheweb.net/knight_physics_for_scientists_and_engineers_4th_edition_solutions.pdfIn PDF document text
    • http://mapenibo.scienceontheweb.net/komelasarutuponavafajo.pdfIn PDF document text
    • http://fulukegoror.getenjoyment.net/11664172819.pdfIn PDF document text
    • http://salet.store/what_day_does_walmart_black_friday_ad_come_out1e9sv.pdfIn PDF document text
    • http://hookup153.space/current_klamath_river_fishing_reportywqn0.pdfIn PDF document text
    • http://creditreportfast.info/465933377138ksgu.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/33357071378.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/jikotidukegurukaxekomakaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_fd002d33350b474a9fd79c1e5bd43763.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/arithmetic_sequence_crossword_puzzle_answers.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_af170e52e4d64fd38eddcb56bd1ab248.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97bf8a11-7aee-4a0b-8570-9b026698514a/kigejanod.pdfIn PDF document text
    • https://43466d02-873c-4564-b63c-f2f79aa6d38e.filesusr.com/ugd/fd64e8_e9b422afa6c0486f815954597636737d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b607437b-34c4-44f8-8174-7a5552555fd7/how_to_describe_depth_of_respirations.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/52151110969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e66d292-18c1-492f-ab3f-14c11e437039/62217764929.pdfIn PDF document text
    • http://timojodabemisux.myartsonline.com/12180492746.pdfIn PDF document text
    • http://jugomirusulove.atwebpages.com/befriending_your_body.pdfIn PDF document text
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_bb5b404edff54dfd9ad68a36f4215f27.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14405 5640 bytes
SHA-256: 7a0414f5b84e10d058e0c8242c1c7c7926f02828eb3650cda84ef7dde0c32731
font_01_sfnt_off00015745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15745 11564 bytes
SHA-256: 792060e3b003a8c8cbccef5573b1e4805610a83ea2611bf64cb99319800f0c30

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