Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d504e4401337819…

MALICIOUS

PDF

87.6 KB Created: 2021-02-26 15:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8864757e3ff2c0bc2a7d2725aa3d8dc0 SHA-1: 03e087e88b721247985f748e96c81458ecc31405 SHA-256: 0d504e4401337819565b04fcef17b12ec439e57f733fe63f7f816f07cad77606
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users to other sites. The primary redirector URL is 'https://jacksth.ru/strik?utm_term=men%25C3%25BA+dieta+disociada+30+d%25C3%25ADas+pdf', which is used to funnel traffic to other PDF download pages. This behavior is indicative of a phishing or malware distribution scheme, leveraging document content to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=men%25C3%25BA+dieta+disociada+30+d%25C3%25ADas+pdf PDF link annotation
    • https://zademufexek.weebly.com/uploads/1/3/4/7/134765537/7942504.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/ieji8Yl/space_shuttle_mission_simulator_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/yAPjcic/64194159167.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/Nge5Jnf/air_traffic_control_system_failure.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/3hgBDiv/97298629720.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/hjiwtQz/62819019181.pdfIn PDF document text
    • https://cdn.sqhk.co/lusesito/G3sWjdK/escape_funky_island_level_7.pdfIn PDF document text
    • https://cdn.sqhk.co/julubesaf/jf4iekS/la_furia_dei_titani_film_completo.pdfIn PDF document text
    • https://cdn.sqhk.co/lazaxosu/cEgfjha/16731229826.pdfIn PDF document text
    • http://kozlo.space/fabeburinasupth8v2.pdfIn PDF document text
    • https://cdn.sqhk.co/lomotutuwe/giajcV7/subway_rush_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/jdgfWnv/49129705246.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/33826849563.pdfIn PDF document text
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/e9d580a50.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/dgf3Egh/dumebetovad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawerudarasikow.myartsonline.com/why_is_my_netgear_powerline_not_working.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/66151598713.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D4 5504 bytes
SHA-256: 2b3fa61fef1354348e9920a108b435d59846cce281b42ac8607c858f3d68cbda
font_01_sfnt_off00010a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6C 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000112fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FA 11580 bytes
SHA-256: 6b04934c6c03357a61e874e242b1bf0021febe157868c57bff17b716c1c7d400
font_03_sfnt_off000138c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C9 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939