Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b50c975f19e7f8e…

MALICIOUS

PDF

86.1 KB Created: 2021-06-07 10:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f2d7ef4ee7f73d1788bab3b306186c72 SHA-1: 53bdf7537dbaeb0c068ebc70e9ed3a7df6cb935e SHA-256: 9b50c975f19e7f8ee9f9e1c160e8c0ea57005427b932405e6f6a333cc788bca6
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with a primary focus on a URL that appears to be a lure for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting an attempt to obscure malicious activity. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/123?utm_term=html+to+pdf+javascript+react PDF link annotation
    • https://xawuvokepixa.weebly.com/uploads/1/3/4/6/134617960/zagiluvosar.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/5042003.pdfIn PDF document text
    • https://nulijuvak.weebly.com/uploads/1/3/3/9/133986618/47e2e71682b.pdfIn PDF document text
    • https://mobejameraxoluv.weebly.com/uploads/1/3/5/3/135316129/fugan_rokirubivib_fifojogafi_vadimuvu.pdfIn PDF document text
    • https://pudevezogezuk.weebly.com/uploads/1/3/4/5/134528534/9502705.pdfIn PDF document text
    • https://vukibawurop.weebly.com/uploads/1/3/4/6/134601902/e79acf755.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
    • http://fuxijovipa.pbworks.com/f/xidiruliv.pdfIn PDF document text
    • http://kufogokoges.pbworks.com/f/67040847166.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/f/what_medications_are_used_to_treat_intermittent_explosive_disorder.pdfIn PDF document text
    • http://xivoxibuza.pbworks.com/f/protective_relaying_principles_and_applications_third_edition_solution_manual.pdfIn PDF document text
    • http://faxamom.pbworks.com/w/file/fetch/144450978/kezanogozopogafalojuwotuk.pdfIn PDF document text
    • http://jasiduvegulu.pbworks.com/f/how_to_convert_watts_to_dbw.pdfIn PDF document text
    • http://wekibivu.pbworks.com/f/the_phantoms_this_is_a_war_mp3_song_download.pdfIn PDF document text
    • http://punumiboxo.pbworks.com/f/community_medicine_park_23rd_edition_free_download.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/f/98758004546.pdfIn PDF document text
    • http://fixulirulafa.pbworks.com/w/file/fetch/144508122/lewis_county_mo_jail_inmate_list.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144556593/tea_bag_poem_funny.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144411681/how_to_mix_salt_reef_tank.pdfIn PDF document text
    • http://rimogeto.pbworks.com/f/chordata_practical_book.pdfIn PDF document text
    • http://vananizi.pbworks.com/w/file/fetch/144713547/bedemeduwogutonuwabutux.pdfIn PDF document text
    • http://sewafebi.pbworks.com/w/file/fetch/144426363/xobasabobiwukodetaluwa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1D 5080 bytes
SHA-256: 27ec0e32d2a28f6caadba700ff4f1f5ee988fb3f2919f1214e4f30053829e0df
font_01_sfnt_off0000ff73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF73 11192 bytes
SHA-256: 1fa9cd34cf5ab16d14703af526a13c40856f51c377b5c3815598d7b7d2d4a2ca
font_02_sfnt_off0001260a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260A 16876 bytes
SHA-256: 8f79c9e4459f19037dc3142a28374e37ba13f53ecfbc148c976825ae12d326d4
font_03_sfnt_off00013ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378