Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6748410d27ef35f…

MALICIOUS

PDF

71.7 KB Created: 2021-02-12 07:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 33777f2282c45a4c0db930a2b2017f56 SHA-1: fa05a4e984b2b5e3703eca376726d3a05cf0b4e7 SHA-256: b6748410d27ef35f6aab7502b7bde77d720455a88a2379f458b75a98cda49e35
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wb?keyword=promissory%20note%20extension%20agreement%20form PDF link annotation
    • https://cdn.sqhk.co/dubikureta/Qjmgdjg/82230179105.pdfIn PDF document text
    • https://cdn.sqhk.co/lotazoza/8Uhd2hi/waxapivigukuwija.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomekurufe/ihfjhge/tanky_elementalist_build_gw2.pdfIn PDF document text
    • https://butijewib.weebly.com/uploads/1/3/4/8/134886415/xixoka.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/2w6Ja5m/counter_combat_online_fps_mod_apk.pdfIn PDF document text
    • https://sojagimizalafar.weebly.com/uploads/1/3/5/3/135317111/moxupojun_lesanal_tajodanolelolib.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/XgenBji/american_truck_simulator_2_pc_mods.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/hFBsiaL/wezuvivujede.pdfIn PDF document text
    • https://jojusilinu.weebly.com/uploads/1/3/4/3/134343509/saxizofid-perir.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/f2ifgh1/buzzfeed_quizzes_guess_the_song.pdfIn PDF document text
    • https://rizogedimawe.weebly.com/uploads/1/3/0/7/130739598/lumukexipinex_kabanaje.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/kudefem/powerpoint_concert_ticket_template.pdfIn PDF document text
    • http://kugibujupedo.rf.gd/fafubevasepofevebizeni.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/kenivarezuj.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/30818778758.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_off0000dcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBE 5228 bytes
SHA-256: 2569e618c173103336d09ae9d18905956de2202e8d372add80a65ce4da21a6cb
font_01_sfnt_off0000ee81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 10496 bytes
SHA-256: f157700109235ba58ad0ec8b9dfb28321d2e071244d9c93c9bd7ce08a18c52cc