Malicious PDF — malware analysis report

Static analysis result for SHA-256 c164119684f6c512…

MALICIOUS

PDF

40.9 KB Created: 2020-10-06 19:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 5c9be03076ea72c8729efa8246259fd6 SHA-1: a44d43df4464d467f44dbc16620d0d7d282d71c2 SHA-256: c164119684f6c5129303310580bf03fb766986b0a88250606c40e42baafc1e8c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/strik?keyword=colour+atlas+of+medical+microbiology+pdf In PDF document text
    • http://mitevaru.bevpurduefineart.com/uploads/1/3/1/3/131398234/007326bd4c.pdfIn PDF document text
    • https://site-1038629.mozfiles.com/files/1038629/zekowusuvuxomitezid.pdfIn PDF document text
    • https://site-1037192.mozfiles.com/files/1037192/febakiza.pdfIn PDF document text
    • https://site-1043796.mozfiles.com/files/1043796/12257751520.pdfIn PDF document text
    • https://site-1036924.mozfiles.com/files/1036924/varaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2337/1935/files/solving_rational_inequalities_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7284/1638/files/misuguzusalotowejolexovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/saxiret.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9631/9148/files/matthew_restall_seven_myths_of_the_spanish_conquest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/kaxiwafomugewufamod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1368/3874/files/47462770105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9904/6046/files/able_planet_sh190_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6572/8920/files/kabizawokoduvejejojonen.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49BA 5620 bytes
SHA-256: 80cd61156725cfc70e70e71e3f47fcec3033d10e339682e7a663136ada057900
font_01_sfnt_off00005cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC1 9436 bytes
SHA-256: 303bd06c2e83be5b2e9e1d306dd77743456c19c697071dac6c58b5896565d1e2
font_02_sfnt_off00007d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2D 16836 bytes
SHA-256: 7b3d0959ae5a211e2fa0fd06577e4febba51683386089d063db984859a895b1b

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