Malicious PDF — malware analysis report

Static analysis result for SHA-256 673100f44d1257ae…

MALICIOUS

PDF

72.3 KB Created: 2021-02-27 18:28:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b52834d90d0f426d87a757bdee97d5ea SHA-1: 8713010333900b8867026a179fd20b29f474814a SHA-256: 673100f44d1257ae086dfd9813f0858500a140292a57fb90c712d85a2159f9ce
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://fokemale.ru/wix?keyword=square+d+panel+schedule+template+excel PDF link annotation
    • https://kupujusurigov.weebly.com/uploads/1/3/4/4/134471221/degezez.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/how_to_schedule_roomba_880.pdfIn PDF document text
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/945405.pdfIn PDF document text
    • http://wijofotezopadik.medianewsonline.com/zarewamipe.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/moxijonogusasewasag.pdfIn PDF document text
    • http://copyrighytsupport.com/44868880406l17d9.pdfIn PDF document text
    • https://daworotiboxega.weebly.com/uploads/1/3/0/7/130775949/6c840f24.pdfIn PDF document text
    • https://naruvemekojesez.weebly.com/uploads/1/3/4/6/134685524/zixagate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/xbox_360_controller_pc_driver_update.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/elsevier_journal_template_doc.pdfIn PDF document text
    • http://zijedan.atwebpages.com/jizidujimuwoga.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/53611492022.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/automatic_guided_vehicle.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/volararoxetexasexumizuda.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_off0000dde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE0 5608 bytes
SHA-256: d932d573e451ddacdf429ad9671b9051cbe78dcf9ef9e9cd5a0daccf03ee2ffc
font_01_sfnt_off0000f0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CF 10280 bytes
SHA-256: 38915cafcdefd6ef600ba37c54bc9c934dd3aa0369116eeaa52df8c91ca9beb3