Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a8584b2318c450…

MALICIOUS

PDF

70.9 KB Created: 2021-03-04 09:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b84c749291ec587c812cac566e80fd65 SHA-1: 858b667c7f4c862c407da756985c74914c160ebd SHA-256: 08a8584b2318c4503b239377cb89df2d9ef5807c4260651e7dd3310dc9290ab6
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://gimoguvi.ru/wix?keyword=gel+electrophoresis+virtual+lab+classzone+answers PDF link annotation
    • https://zuberexuwaxif.weebly.com/uploads/1/3/4/5/134501439/942722.pdfIn PDF document text
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/niwuwi.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/derofopulokejaja.pdfIn PDF document text
    • http://xujukega.66ghz.com/70570314848.pdfIn PDF document text
    • https://cdn.sqhk.co/sunaxidida/G5Ageji/mevurewam.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/60793735333.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/jujaA67/my_events_today.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vufuzewasi/bootstrap_html5_admin_template_free.pdfIn PDF document text
    • http://gevazobi.rf.gd/jupotinivojivujowojezumuk.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/bezolagukevarip.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/74877504170.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/coast_guard_marching_song_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/ill_at_ease_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/86995602787.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/3d_studio_max_2014.pdfIn PDF document text
    • http://vovajixavago.epizy.com/controlling_your_anger_worksheets.pdfIn PDF document text
    • http://fuzimobikuxuta.epizy.com/65247204061.pdfIn PDF document text
    • http://xukobogovug.rf.gd/interview_questions_for_receptionist_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/12827478197.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1C 5276 bytes
SHA-256: f422f5703d9fb4cafbafa22ea00e8ae3670c1dfc71a5fc30a69c1069d724fd10
font_01_sfnt_off0000df1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1C 9604 bytes
SHA-256: 179d070e290db9e401a7294839151e1f9968106dc26d42b52c8c754fe9d1fc24
font_02_sfnt_off0000fff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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