Malicious PDF — malware analysis report

Static analysis result for SHA-256 e774812454be7cf6…

MALICIOUS

PDF

65.0 KB Created: 2021-04-01 20:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: eaf25ba98e54cab4a7704eb4efeb1ae8 SHA-1: fd8be4ceffad0f90493386ae037b3a4fecac59a0 SHA-256: e774812454be7cf60a0862470cad1a837ac79bb82531341a68073c72eff8b31e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'Dell optiplex 9020 motherboard replacement' and includes numerous external URIs, many of which point to disposable hosting. This suggests a phishing or malware distribution lure, likely using the embedded links to redirect users to malicious sites.

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://kuzutuzo.ru/strik?utm_term=dell+optiplex+9020+motherboard+replacement PDF link annotation
    • http://ragukir.iblogger.org/barsaat_film_songs_pk.pdfIn PDF document text
    • http://soferijivav.getenjoyment.net/causes_of_alcohol_addiction.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/41308887541.pdfIn PDF document text
    • http://reduslimitaly-official.website/88117631640es1bs.pdfIn PDF document text
    • http://good-production20.site/16911400239qo64v.pdfIn PDF document text
    • http://good-production9.site/firefox_portable_52._9fgqzg.pdfIn PDF document text
    • http://xifogoweru.22web.org/39546438434.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/journal_of_breastfeeding_filetype.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a2d91d-de31-4b6b-b4a0-487cc54d53d2/tufelerokes.pdfIn PDF document text
    • http://xazesenidivajuk.epizy.com/gekogibebamozigopiwuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46717e42-fb30-4081-86c3-06125306fa9e/a_que_se_debe_el_sonido_en_los_oidos.pdfIn PDF document text
    • http://zudozam.epizy.com/tisonakopibixuropuba.pdfIn PDF document text
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_e530eb9679ec4477817525adca98528d.pdf?index=trueIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_f863200f6dd14d4b953220e3c9d6aeba.pdf?index=trueIn PDF document text
    • http://zuzofigub.rf.gd/70589904554.pdfIn PDF document text
    • http://tiriburud.rf.gd/neripakudalomufemadeta.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_10e81f1dc98242849a98dfcc66938627.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/98afcaf8-f518-402b-814d-8dc8e6f016b9/kelim.pdfIn PDF document text
    • https://30372bae-fb3d-4285-bee0-d91e70c22047.filesusr.com/ugd/835091_4700b3cd1ff34c64a8391a7997bd621b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d387fd-e6dd-4825-8b29-af2a4e01ff31/68128813850.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_off0000c1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C1 5772 bytes
SHA-256: 6860afe71e15ff63842b33bbc5b1de4781b641a3b10166b442f9c9386b23055c
font_01_sfnt_off0000d539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD539 9688 bytes
SHA-256: 048ffa73d1cd0b7e5e19f2fea60dd1526d86ae3772a5e4d1b45b9b8b0c93e52e

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