Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff1a31b47ea1b36…

MALICIOUS

PDF

73.8 KB Created: 2021-03-03 17:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fce693f48ea21f815f9fa5fd6271c851 SHA-1: 078f7995e0a7a0446765aff1080481555aa12974 SHA-256: 1ff1a31b47ea1b367f454a5e7e87cbc70b337d8d401f94320256a18431d41776
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=hp+elitebook+2560p+keyboard+not+working In PDF document text
    • http://tevaruv.sportsontheweb.net/how_to_get_a_international_driving_permit_for_japan.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/mtd_mower_blades_21.pdfIn PDF document text
    • https://nerupeke.weebly.com/uploads/1/3/1/4/131483009/rifuvagevi.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/journal_questions_for_high_school_students.pdfIn PDF document text
    • https://denimuka.weebly.com/uploads/1/3/4/5/134582609/6fc3084f05.pdfIn PDF document text
    • https://titezexi.weebly.com/uploads/1/3/4/6/134639754/238505.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/how_long_will_an_ecg_take.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/kiguteperilodu/ghost_recon_breakpoint_open_beta_cross_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/64296962012.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/tulopan.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/7_continents_worksheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/annotation_guide_ap_lang.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/ramalo.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/texas_dmv_driving_test_study_guide.pdfIn PDF document text
    • http://lubozogemodusa.epizy.com/18101099167.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/87283885106.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/93561657625.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/house_bill_of_lading_format.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_off0000e20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20C 5860 bytes
SHA-256: 3f1959a134e758dedaaa140dae5e872a014c168c809ff1cb6e0662490161baf8
font_01_sfnt_off0000f626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF626 10528 bytes
SHA-256: 9e7fac57666e8b962f4a3fafdec5424cacedddd8a582602df3ae3380fa8b29e7