Malicious PDF — malware analysis report

Static analysis result for SHA-256 0984b74077abbc4b…

MALICIOUS

PDF

77.1 KB Created: 2021-04-06 12:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6d8ed299a730f3d8730ed1bfd2f8571e SHA-1: 4ff17d483b3fe4aafb605d0702e9f151890127f9 SHA-256: 0984b74077abbc4b8fe6c6b4bae698ff2911c772c6d27f16c5626d8b138cb200
126 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://ponafet.ru/strik?utm_term=why+is+sky+remote+beeping', which is likely a phishing or malware distribution URL. The PDF also functions as a link farm, with many embedded URLs, suggesting an attempt to direct users to potentially harmful 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://ponafet.ru/strik?utm_term=why+is+sky+remote+beeping PDF link annotation
    • http://copyrightnotices-form.com/38416972427xt8nu.pdfIn PDF document text
    • http://avlto.best/what_to_do_after_24_day_advocare_challengedtii1.pdfIn PDF document text
    • https://diziwupufetut.weebly.com/uploads/1/3/4/4/134477772/mubakisepobov_roseze_sovabew_xigow.pdfIn PDF document text
    • http://alcexpress3.xyz/lamewezoxulogureluribzetf.pdfIn PDF document text
    • http://mikrotikwizard.com/tisedofejugefudoujao7.pdfIn PDF document text
    • https://kaxokotul.weebly.com/uploads/1/3/4/3/134380066/dopuka_fukibemesa.pdfIn PDF document text
    • https://bujasosepamus.weebly.com/uploads/1/3/4/6/134626994/634177.pdfIn PDF document text
    • http://tiktoktop.design/2989309484409bsd.pdfIn PDF document text
    • http://thelandofbadideas.com/two_way_frequency_table_worksheet_and_answersek3yz.pdfIn PDF document text
    • http://teachost.com/42558129479slq04.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://uploads.strikinglycdn.com/files/0fc5ac55-c312-40a9-a9ee-afc8ac5a45d5/lincolns_reconstruction_plan_date.pdfIn PDF document text
    • http://xuvotawelotito.epizy.com/infective_endocarditis_guidelines_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/complete_list_of_dd_races.pdfIn PDF document text
    • http://vatapusaf.rf.gd/whatsapp_messenger_apk_para_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/woe_is_me_saying.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11ffa9e-b38e-4124-af0e-315059e1765b/free_download_film_fifty_shades_darker_full_movie_sub_indo.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_off0000e16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16D 5096 bytes
SHA-256: 01cb5ff00f029df0e4a21228e327256b276ff89a691fb75b75984fa9fe3bcded
font_01_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 10932 bytes
SHA-256: 9b2f92cfcdefdf608b63dd8ccd9940344a11273aa782e9d092d22b393e9eb05c
font_02_sfnt_off000117f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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