Malicious PDF — malware analysis report

Static analysis result for SHA-256 d793a64983eca387…

MALICIOUS

PDF

79.2 KB Created: 2021-03-28 00:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c97a5098e3564f77836af150874a5c46 SHA-1: 81500f423cb47c063805948e0abb6013b6657dad SHA-256: d793a64983eca387592668ac9304e250605c5b96a40c068a587a47796472a719
194 Risk Score

Malware Insights

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

This PDF document contains a significant number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and extensive link farm are strong indicators of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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/wix?keyword=plenix+clash+apk+download+for+android PDF link annotation
    • https://voxaxaloxedifuz.weebly.com/uploads/1/3/5/3/135399296/1756142.pdfIn PDF document text
    • http://vashobereg.com/weber_bbq_best_price_perthz1g44.pdfIn PDF document text
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/loxasifig_rusijuwipiw_vixipajum.pdfIn PDF document text
    • https://bivapere.weebly.com/uploads/1/3/4/6/134689139/6642609.pdfIn PDF document text
    • https://kototavuwo.weebly.com/uploads/1/3/4/6/134696015/fb6dd9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_600cfb2944352.pdfIn PDF document text
    • https://lokevevivepino.weebly.com/uploads/1/3/4/1/134131736/vivomulimel.pdfIn PDF document text
    • http://fixmarker.fun/49134093508mbuty.pdfIn PDF document text
    • http://tevajevidiwa.22web.org/aggression_questionnaire_report.pdfIn PDF document text
    • http://dajewerudo.22web.org/contract_acceptance_email_template.pdfIn PDF document text
    • http://skywonder.space/what_qualifications_do_you_need_to_be_a_special_needs_teaching_assistant7qw6v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454179/normal_5fff30b50e1a2.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://pagerufusowa.epizy.com/32493410607.pdfIn PDF document text
    • http://vawapod.rf.gd/what_are_the_different_film_genres_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42afcb71-7817-4bc3-a895-6b83dea69525/blue_eyed_mini_dachshunds_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cba60190-df68-48ad-99b2-092406f36d37/lalagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e5e9e5-7263-4b35-9c93-c07329245c71/does_my_honda_have_an_airbag_recall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a351409-1a6e-4a74-afb8-fdbdb0faa1f2/rexefuxemabimobifapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4780487c-2433-41a5-ada7-6ce22cf98e09/58263654391.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7E 5176 bytes
SHA-256: 5a6d08136a3d330360a6be4532dd3ecc7dfabf9e0635f752beb042825cd648be
font_01_sfnt_off0000fc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC10 11040 bytes
SHA-256: 62d2e3b2510fc977cf312e759280270508cd5fe01d7fd48859927dbb0912546f
font_02_sfnt_off000121a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f