Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5033a97c21818f9…

MALICIOUS

PDF

67.6 KB Created: 2021-03-03 23:01:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bf1d39159fd540541631507a7c3b22b6 SHA-1: 5c9c96941d71e73ecaa449e0ba1c30e5de8d5acf SHA-256: b5033a97c21818f9502ad6e07e4adcbbe737ee5d1d96530c79a1101d4501630d
196 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
  • 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://jottigo.ru/award?keyword=skilsaw+mag+77+power+cord PDF link annotation
    • https://xadidevoki.weebly.com/uploads/1/3/0/8/130873902/4628985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_6016eb76b7182.pdfIn PDF document text
    • https://xuzijobozu.weebly.com/uploads/1/3/1/4/131411245/4062406.pdfIn PDF document text
    • https://petugaxuw.weebly.com/uploads/1/3/5/3/135397026/9164428.pdfIn PDF document text
    • https://jinuvavuvebox.weebly.com/uploads/1/3/4/6/134612635/68a66607493.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/how_to_use_new_microsoft_office_access_2007_database.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459628/normal_60191b4f2270f.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/igehbag/diy_couple_halloween_costumes_pinterest.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/b0CWGgg/77199882164.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/suxuzubojut/savejebelinujorekagobogot.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/ultrasound_receive_beamforming.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/zorix.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/95754153443.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/edexcel_igcse_economics_student_book_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/52787695928.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/where_can_i_donate_furniture_right_now.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_off0000cbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFE 5732 bytes
SHA-256: 6fbc0a62205ccf92b537f8a06d296a891d9cbfbe7d88a0268ecf866a3b9c6edb
font_01_sfnt_off0000df91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 9960 bytes
SHA-256: ae92808d08a6947403f8d628b693108edb99ddef601beb0dc86e378637557419

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