Malicious PDF — malware analysis report

Static analysis result for SHA-256 162b909e8b96baba…

MALICIOUS

PDF

68.5 KB Created: 2021-03-07 22:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0c8733fb949fc07ef82dcdb735275911 SHA-1: 8c1d8dc4f47156fd54db5aba2088a0e36d6333c7 SHA-256: 162b909e8b96baba715acc1bc5b6450325b03b1e0550191138b3744aafbe3124
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The presence of a 'download button' lure and a 'password-protected archive' hint strongly towards a social engineering attack designed to trick the user into downloading a malicious payload. ClamAV detection and ML classification further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/aws?utm_term=mamiya+rb67+pro+manual PDF link annotation
    • http://fepafotejidug.iblogger.org/the_poison_rose_2019_parents_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/rokajoten/fhfvjck/50127866722.pdfIn PDF document text
    • https://pederojelukeb.weebly.com/uploads/1/3/4/8/134859697/2697271.pdfIn PDF document text
    • https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/buzikulesivetib-fetavefugupovif.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/Fihihhe/rakiloler.pdfIn PDF document text
    • https://nugibunexediga.weebly.com/uploads/1/3/0/7/130740514/2405263.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/jfhhgi9/growtopia_change_your_password.pdfIn PDF document text
    • https://tatazopizen.weebly.com/uploads/1/3/1/1/131163492/buxarigude.pdfIn PDF document text
    • http://maxufadewodov.22web.org/year_end_sales_review_template.pdfIn PDF document text
    • https://luwigemo.weebly.com/uploads/1/3/4/5/134597726/1861455.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/zigakewu.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/ahNcCkC/95194715587.pdfIn PDF document text
    • https://puliwive.weebly.com/uploads/1/3/4/6/134660228/ec6d21685022e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lejemerane.epizy.com/33865421209.pdfIn PDF document text
    • http://kumesebupaxat.epizy.com/dodowenirijonurikowufalej.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/magic_quadrant_for_analytics_and_business_intelligence_platforms_2019.pdfIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_6b8c147f8aa54d97af04f395a8cf2378.pdf?index=trueIn PDF document text
    • http://fugexumelelada.rf.gd/anna_seghers_transit_analyse.pdfIn PDF document text
    • http://wanabovemuzume.rf.gd/itc_new_baskerville_bold_sc_free.pdfIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_2f4dc10504484a8499c20c14ba91f2b1.pdf?index=trueIn PDF document text
    • http://favebabusapador.rf.gd/how_many_ace_cards_are_there_in_a_deck_of_card.pdfIn PDF document text
    • http://povemuxituziv.epizy.com/interpreting_data_from_graphs_worksheets.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_off0000cca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA3 5268 bytes
SHA-256: 76a2e0bff27613b6d231c99a6e2b5105afa0a769414b3912e4a86895343c9037
font_01_sfnt_off0000de92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE92 11196 bytes
SHA-256: 1180944e777e44ff413df743efd0a57a0b6874f250804230a334c564f2f9247d