Malicious PDF — malware analysis report

Static analysis result for SHA-256 058758b1283e14fa…

MALICIOUS

PDF

69.8 KB Created: 2021-02-01 23:33:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 373b509445a94f22a02cd75adf073e80 SHA-1: 1ea2b615aa52d3ee0c483b202ec0ba157614760a SHA-256: 058758b1283e14fac582d9fef2d61ad7d17ed802e8e489758174ed403ca22e01
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/shook?utm_term=arcade+ball+games+for+sale In PDF document text
    • https://fiwofufoneronup.weebly.com/uploads/1/3/1/0/131071066/pakesulupuga.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuluxaja/ikidZhf/tuberidezedomeferoputovo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480580/normal_5fed65d653294.pdfIn PDF document text
    • https://zujefimobob.weebly.com/uploads/1/3/1/4/131453463/124525.pdfIn PDF document text
    • https://seporulakokifo.weebly.com/uploads/1/3/4/5/134590723/pudemiko.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/pjKigjf/tupekegade.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/ha8ibgd/4830408149.pdfIn PDF document text
    • https://cdn.sqhk.co/lulamekajasu/0harJgg/pewedezovaxeripexonuwoku.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/8t5LQIl/forgotten_landmarks_of_detroit.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/sakur-derumebefoxizem-tarude-nebisep.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/jarirotexab/bumetezixe.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/vocabulary_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/crystal_report_8._5_runtime_64-_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/xijizodirorokapojaginu.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/6396874812.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/dumexuf.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/free_calendar_template_2018_september.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/wojirajidorat.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_off0000d4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B4 5472 bytes
SHA-256: b2b6acb7577a12e233c9d2eba47cedd279522c41e26c62caef2daaf5ba75018b
font_01_sfnt_off0000e734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE734 10324 bytes
SHA-256: de6b63e878d572594dc6ce629a130e6b3056f30c5b025d3d2907468611275801

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