Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93abb17b28fb72f…

MALICIOUS

PDF

65.9 KB Created: 2021-01-31 01:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b644717815d7a06f1e1b6bf2c19346ee SHA-1: 09427144d61721b35fbbe20b445bd4ed311fa998 SHA-256: b93abb17b28fb72f68b2e371569dd2e878d4a8ed8ec5c77cbfff4537af853c52
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://baarspo.ru/wb?keyword=burgerology%20patchogue%20reservations PDF link annotation
    • https://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/a2ac8e0d491c.pdfIn PDF document text
    • https://junezemojevav.weebly.com/uploads/1/3/2/7/132740237/ralivu_dirinewotux.pdfIn PDF document text
    • https://cdn.sqhk.co/miropefaneka/ghighfc/dinofegovo.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/1960739.pdfIn PDF document text
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/rowesa-memufuwakulexok.pdfIn PDF document text
    • https://nitavadokeja.weebly.com/uploads/1/3/1/1/131163909/vemixowidaxit_pibojufabu_vixuj_supebobatuwaz.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/iaeidhd/43676980930.pdfIn PDF document text
    • https://romiwewigases.weebly.com/uploads/1/3/2/6/132682929/9720033.pdfIn PDF document text
    • https://janodiwuzujemux.weebly.com/uploads/1/3/1/3/131382133/0c9246df7c94.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/wixamupelinere/wave_impedance_of_circular_waveguide.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/50216764231.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/78323446654.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/tizebad.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/53031544507.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/personal_introduction_powerpoint_template_free.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_off0000c516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC516 5408 bytes
SHA-256: 862e1436fd823215d8422a9c66025bc2ceaafbba36a2127629bf78401574dd64
font_01_sfnt_off0000d783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD783 10380 bytes
SHA-256: ec27b1657f42db4039cbf3adc2a3ecea72b3da2665e6614eb32ad47f5da523ea