Malicious PDF — malware analysis report

Static analysis result for SHA-256 edee90b55a28d22a…

MALICIOUS

PDF

66.0 KB Created: 2021-02-25 09:11:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a1d460b5942170ffe48e96af64623e79 SHA-1: 37c53e4de6a6cd9630f1ce27645641c846df7e40 SHA-256: edee90b55a28d22ad90232b40b01b6a034c37fea457b44264f9526f0e5673849
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=rock+n+roll+snowman PDF link annotation
    • https://cdn.sqhk.co/xevowuto/dqiehhv/diy_christmas_costume_ideas_for_adults.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485705/normal_60081a542b9be.pdfIn PDF document text
    • https://cdn.sqhk.co/bodujemep/RjdhaYz/dual_federalism_is_also_known_as.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/ijhigjc/seven_tiles_game_rules.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/josasolixawif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452206/normal_601bbac83610d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410015/normal_5febfff18adc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444123/normal_6015a52d26ae2.pdfIn PDF document text
    • https://nililuwuta.weebly.com/uploads/1/3/0/7/130775375/9541190.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468571/normal_6005c3814c0fe.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/nuxomigo/common_core_state_standards_math_california.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/lepesenogadimika.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/steam_while_gaming.pdfIn PDF document text
    • http://winenezufu.epizy.com/2sc5200_amplifier_circuit_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/superhero_bulking_program_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/nuvipanaruromofu.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_off0000c561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC561 5108 bytes
SHA-256: aa945a0c4697c2b52ece4dbf053c9f0e8a327215943386a90c5c381a6f2ab9de
font_01_sfnt_off0000d6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C5 10864 bytes
SHA-256: 5e107621a1677830f9527cdfc8558d657703293288fb50c5ad5e1bcc58ab9540