Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bda23fa855cc1d…

MALICIOUS

PDF

65.7 KB Created: 2020-11-10 04:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: cb93e8c527882af4823ffb1ab6771329 SHA-1: 1412f2ff26a19cdb86579df9b885da65ef64c6f9 SHA-256: 07bda23fa855cc1dbf8ecaa7a92f3d483d043722d745d7c557c4bed3106ada1d
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=hp+2131+install In PDF document text
    • https://fologonalufofu.weebly.com/uploads/1/3/4/6/134694067/gupowunujegetu.pdfIn PDF document text
    • https://xuxixoxeniti.weebly.com/uploads/1/3/4/5/134585484/vokabimitegojifuna.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/xawasazijuwoved.pdfIn PDF document text
    • https://farenutatovepo.weebly.com/uploads/1/3/4/5/134502273/nuzufomunew-sulokewomanud-waxipirazi-geninuxusu.pdfIn PDF document text
    • https://fivilogavizizov.weebly.com/uploads/1/3/4/4/134446089/4e90be375a5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478670/normal_5fa97a309c1ae.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/tujeviwakirawu/alzheimer_s_disease_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/photoshop_3d_text_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/triangle_congruence_by_asa_and_aas_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/rave_glow_sticks_gif.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/pepewukutevivajebo.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_off0000c6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CA 5024 bytes
SHA-256: bfed7298aed36c98431f00724393b28071af9ddf60d264fd0b80296e7a88be6d
font_01_sfnt_off0000d7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FB 10192 bytes
SHA-256: dcbf3c350a0567bb66737ab8b512200ae658250e88f355dfdc7c43af044cdb06