Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea84bba06080e95c…

MALICIOUS

PDF

79.4 KB Created: 2021-03-23 12:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7bad7c11f16fdd8c303b5330477bb642 SHA-1: 4b8887c64a22f609ef928618d1ea4dc0d0fda05a SHA-256: ea84bba06080e95cda1836e823c96c59213103efec2306807ef7739f5427de95
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one pointing to 'golowaki.ru', suggesting it functions as a lure to external content. The PDF's structure and embedded links indicate it is part of a link farm designed to redirect users, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=abscesso+amigdaliano+pdf PDF link annotation
    • https://pefojefevofat.weebly.com/uploads/1/3/4/6/134659321/718169.pdfIn PDF document text
    • https://cdn.sqhk.co/wotezowedo/9hbjfbc/supreme_duelist_stickman_crazy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/mbgjigC/vexation_meaning_in_bengali.pdfIn PDF document text
    • https://sefusozikoju.weebly.com/uploads/1/3/4/3/134366316/visexixulekufi.pdfIn PDF document text
    • http://puxuwowu.iblogger.org/autocad_2007_cracked_version_free.pdfIn PDF document text
    • https://katibaluzopoxu.weebly.com/uploads/1/3/0/7/130738884/f31eb50808c0.pdfIn PDF document text
    • https://cdn.sqhk.co/momogajopi/hbhchcP/17415533928.pdfIn PDF document text
    • https://nerukime.weebly.com/uploads/1/3/1/3/131379394/tabinonokoweniw_bibupo.pdfIn PDF document text
    • https://cdn.sqhk.co/fesoxuleri/4hhegdQ/gakezewisukepifevubete.pdfIn PDF document text
    • http://fisutef.iblogger.org/mugonezizof.pdfIn PDF document text
    • https://vuxulirupam.weebly.com/uploads/1/3/5/3/135346280/13df620701247.pdfIn PDF document text
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/losebas.pdfIn PDF document text
    • http://zoradiwa.iblogger.org/44944234935.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/dQohfie/70675723154.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/12355c1a-6095-4c47-a6c9-28455124a6e8/what_is_a_cbs_code_for_supra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4cb258-b172-485c-81b5-89206f7622b8/toxajoribunanike.pdfIn PDF document text
    • http://ziboporo.epizy.com/tiserofa.pdfIn PDF document text
    • http://tinejamuwaki.epizy.com/63067199916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c180cbf6-7e5e-427e-b72e-2667d23c974c/67005070607.pdfIn PDF document text
    • http://xuwixevuje.rf.gd/31134374014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22de4b6c-e409-42e4-88fb-b21d791d0e94/52713958173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c49d72af-b8e2-418c-a6d0-64d584122880/88903578069.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_off0000f2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E4 5508 bytes
SHA-256: 25c44f7dd588f6093e89cd31e59003958bcf501e46a3470000a8764cfeac29da
font_01_sfnt_off0001058f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058F 14136 bytes
SHA-256: 8bf617a8a370ee1a3220b70f6f80977c201c058cfd035d8685010bf21d7ba69f

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