Malicious PDF — malware analysis report

Static analysis result for SHA-256 3956adb6eccd1375…

MALICIOUS

PDF

69.2 KB Created: 2021-02-24 13:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 66b0008edf7fe1b21c513eb74030bd45 SHA-1: 04434bb591885cdd259035275ce67ee54390388a SHA-256: 3956adb6eccd137532592965276b7870710bfbfbe1575485f0a8d1396fe44dc0
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://jacksth.ru/aws?utm_term=fundamentals+of+physics+solutions+pdf PDF link annotation
    • http://boldly-grow.com/solitaire_ai_factory_apka9sxp.pdfIn PDF document text
    • https://zesalogerevuj.weebly.com/uploads/1/3/4/6/134684883/vuvow.pdfIn PDF document text
    • http://remont-pc.website/cv_builder_freekv5rp.pdfIn PDF document text
    • https://tulaliferejuza.weebly.com/uploads/1/3/0/7/130775137/xagogadedutitipelid.pdfIn PDF document text
    • http://idealslim-ordina.site/3525481466tq0dc.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/mopabinoranimolzz84.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/1d1800b82284.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/gepazizopoxapaka.pdfIn PDF document text
    • http://ecoservice-vlad.ru/duxejukagige6evux.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/fuwawibu/fejered.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/33724760158.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/39673784895.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/21535032929.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/application_film_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/salubarudeduzerovafuseli.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_off0000ce6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6C 5356 bytes
SHA-256: 5c450e3f83d6c66f3fec4da3bbe8143938164321d9012ee2420738a8cb4c93ff
font_01_sfnt_off0000e091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE091 11080 bytes
SHA-256: 4d9b47623cdd5943cddca21269c852d0e1c6897e99911167c1c81c88dd13645d