Malicious PDF — malware analysis report

Static analysis result for SHA-256 671d5cfea5b14600…

MALICIOUS

PDF

42.9 KB Created: 2020-10-02 16:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: eb12ff5a7ee64d20f08e2483f4e53779 SHA-1: e3f148f48997a02e330b1eb283b450ef6daae9c5 SHA-256: 671d5cfea5b146002c24989d52cf02371c2330ac03f60ac30e9a1baa5cea64b5
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=graveyard+keeper+alchemy+lab+layout In PDF document text
    • http://files.daydreameventsbyjess.com/uploads/1/3/2/7/132740423/d4c1714658d11e.pdfIn PDF document text
    • http://files.spanishflamencodance.com/uploads/1/3/0/9/130969431/xoralelovozami.pdfIn PDF document text
    • http://files.sweetwoodhavanese.com/uploads/1/3/1/4/131454262/f492e8c870a.pdfIn PDF document text
    • https://site-1040319.mozfiles.com/files/1040319/64031032571.pdfIn PDF document text
    • http://files.playsport-usa.com/uploads/1/3/0/8/130814397/piruvitewomilis.pdfIn PDF document text
    • http://files.ipropertiesjkt.com/uploads/1/3/1/4/131407877/2077166.pdfIn PDF document text
    • http://gajepugaz.oldparkgcequip.com/uploads/1/3/1/8/131871786/7aa0beb691b732a.pdfIn PDF document text
    • http://tukir.leeloosesotericorner.com/uploads/1/3/2/6/132681229/2109701.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3968/6556/files/portafolio_de_evidencias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/milwaukee_2420-20_bare_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5420/3031/files/michigan_alcohol_laws.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1220/9314/files/walmart_midland_tx_79701.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE6 5260 bytes
SHA-256: 832b56b0d8916540a4e4cee1155b2406ba8b1ec38fc039b8b04ac7eee57f91cb
font_01_sfnt_off00006ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDC 10296 bytes
SHA-256: 6ddee4ba3125114b576e3483ca44305b962d0e923ffa1cff7157f7f89f94ab08
font_02_sfnt_off00009100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9100 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3