Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2b7d8029be5219…

MALICIOUS

PDF

69.6 KB Created: 2021-02-26 22:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bd8b2c2efcfdaa01d536e9d4f29b92d8 SHA-1: 42bb0c63010f0c1d7e7ab0598b4201dbf5dcd36d SHA-256: 1d2b7d8029be5219dbc761c455cb3a1c07e882f260bd17fc60f728b832c23004
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://jottigo.ru/wix?keyword=unitime+exam+schedule PDF link annotation
    • https://fojomuku.weebly.com/uploads/1/3/4/4/134447263/3471253.pdfIn PDF document text
    • http://voirlo.xyz/tachycardie_atriale_focale04zh0.pdfIn PDF document text
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/dimowelo.pdfIn PDF document text
    • http://abreudesigns.com/anets_sdr_21_partscd4lt.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/0hdhiVy/tinumorok.pdfIn PDF document text
    • https://cdn.sqhk.co/gulijolane/EkF8ijg/fifolelezubijasisav.pdfIn PDF document text
    • http://sfhgfje5df.xyz/86020539108ilb5p.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/yBhghgF/zutegapola.pdfIn PDF document text
    • http://myyshooop227.site/236284786f9unh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457011/normal_5fe748b14a024.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/jgjjCha/66901671614.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/ghqzhbz/infinity_flyer_endless_runner_rhythm_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/muvifisi/ooigifV/the_tiny_bang_story_light_walkthrough_part_5.pdfIn PDF document text
    • http://lessonsonline.site/home_office_fact_sheet_cbdhcvw5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cf73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF73 5144 bytes
SHA-256: 7ccec7b013d07816c66f48a0afc12f1c7bf724348467255f50772f4e4019d37c
font_01_sfnt_off0000e0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D0 12824 bytes
SHA-256: aa36d90330484bbfa13f3c9f0f8b9a02e70b451976e56428df95ecedb4833651