Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e61dc6a3232e442…

MALICIOUS

PDF

80.3 KB Created: 2021-03-09 16:03:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 26f455b1c694e424d512664f52a320b4 SHA-1: 5fbc344a68ac720978772f44e23559046970daf6 SHA-256: 9e61dc6a3232e442bf51a03a1d05bb689cd83fb93e31639b58f79da383cd14c4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, with one prominent URL pointing to 'ponafet.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=sulfur+express+your+answer+as+a+chemical+symbol PDF link annotation
    • http://krepezh.guru/bostitch_floor_nailer_not_workingzkv4t.pdfIn PDF document text
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/8947844.pdfIn PDF document text
    • http://thailandlove.site/18888738565avw1s.pdfIn PDF document text
    • https://nuramovu.weebly.com/uploads/1/3/4/3/134363108/669657.pdfIn PDF document text
    • http://zerkalo-fugicar.website/dnd_5e_ballista_ruleskpvqf.pdfIn PDF document text
    • http://sacredname.ru/why_were_alliances_a_main_cause_of_world_war_i_brainlypn0mp.pdfIn PDF document text
    • https://jiziweradufib.weebly.com/uploads/1/3/4/8/134847172/jaxirosiguzeg-jigab.pdfIn PDF document text
    • https://gematisi.weebly.com/uploads/1/3/4/5/134599806/7180395.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/cajun_injector_electric_smoker_xl_manuallajuf.pdfIn PDF document text
    • http://supsun-aero.com/tagexewoxogbf7.pdfIn PDF document text
    • http://rorejidefozuroz.iblogger.org/sozubesiger.pdfIn PDF document text
    • http://todayit.pro/26552182804uf7iv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_ff8dfd52b9064896b4df5d148da5d095.pdf?index=trueIn PDF document text
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_4a9c969d63bf43b8a15ce48f16c173a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6e7604d-e06e-4c39-84ac-8e536ded379d/88793034298.pdfIn PDF document text
    • http://leralobov.epizy.com/suwopeloxabipedod.pdfIn PDF document text
    • http://xavuguwibimovin.epizy.com/pimesapojufubezolobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e08414d5-2f87-4680-a05a-36699516788b/kalunata.pdfIn PDF document text
    • http://timawerana.epizy.com/notedivoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee10167-8555-4700-b955-5172151442c3/78726924416.pdfIn PDF document text
    • http://porilebunenagu.rf.gd/which_of_the_following_is_most_clearly_an_example_of_process_innovation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 5560 bytes
SHA-256: b9f2b89fed6d4b976321eb1441f3a409fd64811c3ba3c26cec31c0d6ebf2c216
font_01_sfnt_off0001004a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 10980 bytes
SHA-256: c38d05960bcf8154b87f9a709a0d9e5fa089ebdcf52030fe379c37baa2a8af84
font_02_sfnt_off000125bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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