Malicious PDF — malware analysis report

Static analysis result for SHA-256 5421475ee01667b0…

MALICIOUS

PDF

42.3 KB Created: 2020-10-10 00:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7731505176b60616acec074742897efa SHA-1: faa7872578bb6e8b2a91c67a7609273824d694d4 SHA-256: 5421475ee01667b0923cbb5b7953b828373751f048d08e715fbed565995a5bbb
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://ggtraff.ru/strik?keyword=el+animal+mas+grande+del+mundo In PDF document text
    • http://sopuvazi.jillwilsonphotographyllc.com/uploads/1/3/1/8/131856643/vipefiw_lonewaf_mevirodipali.pdfIn PDF document text
    • http://gerado.shellyliedtke.com/uploads/1/3/0/7/130775403/f32d4297f311e7.pdfIn PDF document text
    • http://pevazibin.lcandlepress.com/uploads/1/3/0/7/130776082/deserivum-vajikijirixa.pdfIn PDF document text
    • http://dasola.rabbicallie.com/uploads/1/3/1/0/131071145/273908.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/1/0433/7205/2634/files/wupujupovupiziwikepili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/individual_oral_presentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8060/4065/files/99813652756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0996/4694/files/co2_laser_engraver_cost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2627/1384/files/ssbm_captain_falcon_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5051/files/the_sniper_short_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8874f6fe-13fe-4b51-be91-09b0e79bc8f8/19138731595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/755b9b05-e301-4ee4-b9a7-d8f0789dfd27/jologipiked.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_off000065c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C8 5100 bytes
SHA-256: 5ffc2c1c9b32eab6abee6524de5a622d5b4c0ce7a9e6f4141e8038dc18ff1c58
font_01_sfnt_off0000770a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770A 11116 bytes
SHA-256: 100b9632e6b47feaa391852cf0e1ede9d49971338c545fd8342b006814e67639