Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a44e23a95512700…

MALICIOUS

PDF

68.3 KB Created: 2021-02-25 07:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7684fb9a40e652e4f748754c495629ad SHA-1: 15a2d37a5abf66ff73eb3fb954387fa7b7873d2d SHA-256: 9a44e23a955127004435537add3bacf660707d61f968bde26da024a11a9a63fa
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://bologen.ru/wix?keyword=volunteer+opportunities+for+college+students PDF link annotation
    • https://newabezuvusadak.weebly.com/uploads/1/3/5/3/135347141/ef4a58d88cf.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/HiMjagc/the_hunt_wild_duck_hunting_season_georgia.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/bkUhjVj/arenanet_change_email.pdfIn PDF document text
    • https://lolizafopig.weebly.com/uploads/1/3/1/4/131453679/tinufej.pdfIn PDF document text
    • https://kekisuganuzab.weebly.com/uploads/1/3/4/7/134721312/39284b12ef0.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/z5gfoV3/1149567132.pdfIn PDF document text
    • http://tonorubur.22web.org/xakasogure.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/3PWFTia/93223278064.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/djhpvvv/majumilipesinixapu.pdfIn PDF document text
    • https://cdn.sqhk.co/zixedagiro/TjgygdM/top_10_sound_effects_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/jg0Adif/photo_editor_eye_color_changing_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugujub.onlinewebshop.net/eminem_lose_yourself_lyrics.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/who_is_the_little_girl_in_pet_sematary.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_off0000cfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD3 5080 bytes
SHA-256: 936d9654079a2cf1a1ed2eafb25673d976abf3b2947b5bd77c4a09daa24237f3
font_01_sfnt_off0000e136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE136 10388 bytes
SHA-256: f375eed20aa9024363b1e8e22359dfe4f9b99fd838fdddf07cdd1786b882155e