Malicious PDF — malware analysis report

Static analysis result for SHA-256 c608504b48220b24…

MALICIOUS

PDF

71.6 KB Created: 2021-02-16 20:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 631b6f13af412f309aadb2ec1b4ca198 SHA-1: baaf5fc4c5c407c5831938d965f2a1028d0bf6f4 SHA-256: c608504b48220b2486db9fe050ee7f81b87734211609d1333ac2af46bde04f83
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=lg+magic+remote+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366662/normal_601647e250f1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365541/normal_5ff25d0715c7d.pdfIn PDF document text
    • https://cdn.sqhk.co/bezugisav/ghih1ji/harvard_business_manager.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_60047524b4b85.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/iFjjjgd/97508969598.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/5526581.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/wPzojaT/disney_frozen_theme_ice_cream_maker_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/YxTic57/futirogolusomafo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448992/normal_60035d51c0767.pdfIn PDF document text
    • https://pepizowa.weebly.com/uploads/1/3/2/7/132711999/5c23c2997fcff.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/semuxemakaw/3d_telugu_movie_audio_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/vonanetoluruxumam.pdfIn PDF document text
    • http://potelodifudoduj.epizy.com/divergence_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/arithmetic_progression_class_10_ssc.pdfIn PDF document text
    • http://wedalavunobuwe.rf.gd/liridusebogugelororivawu.pdfIn PDF document text
    • http://gunijeru.rf.gd/office_space_tps_reports_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/weraxowopavazujoze.pdfIn PDF document text
    • http://fufezexu.epizy.com/fuvojimezikimasusojel.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/biperideno_ampola_bula.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_off0000de20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE20 4884 bytes
SHA-256: 252166a7600325cb9486424053f1b46bac2829b7f310ed07dcc842e70432b016
font_01_sfnt_off0000eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA9 10196 bytes
SHA-256: 5ba45d5871d5c6d68a6589146c565cd6f8298520176543a25b80d6f9b57005fb