Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4d88fc002274ee…

MALICIOUS

PDF

44.7 KB Created: 2020-10-08 06:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4ee6c4a3da986d1762c9c3117cefc730 SHA-1: 195018f910d236dfb9a4185b3e7b3cd34420933e SHA-256: 9c4d88fc002274ee27f96ae0ac701be6eeac5ae980f42f2c531473766b116c4e
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=composition+of+transformations+worksheet+answer+key In PDF document text
    • http://files.arlenechicolugo.com/uploads/1/3/0/7/130776738/10da61615ea.pdfIn PDF document text
    • http://files.bmvisions.com/uploads/1/3/2/8/132814624/sefomexuteriter_pidufovog_bebevetuxujele_pogowado.pdfIn PDF document text
    • http://ziramabab.castlescoins.com/uploads/1/3/0/8/130874431/xepopiwamojib.pdfIn PDF document text
    • http://files.oabfs.com/uploads/1/3/1/4/131452989/7932402.pdfIn PDF document text
    • http://lofor.hawaiianisleflowers.com/uploads/1/3/1/4/131406861/61f75ddfb2271f.pdfIn PDF document text
    • http://fawekag.intidharsaleh.com/uploads/1/3/1/6/131606490/mawivonu.pdfIn PDF document text
    • http://wizariki.ghoulagebrands.com/uploads/1/3/1/4/131453850/6dc38981e871cf9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/529f4170-bba5-443b-93f7-d9ec07aff65c/jutipari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df89724-c0a6-4179-880b-eb00c828a82e/zosojibafomutebavilus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae05b20-4806-4a72-9be3-dbd44fb22ab3/xusozexoxonijopoxiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4357baf7-d566-4417-afb9-c17754414bb7/gitokizatujumuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1751/7725/files/original_mario_game_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5024/6048/files/full_tang_katana_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4899/5493/files/spt_sd-2201w_dimensions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4938/5126/files/86978543495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3513/9477/files/32025488984.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_off0000716c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716C 5272 bytes
SHA-256: f86f57081c2eccc140766296fb30f967d2d2b7d66da1f91c9c4579df5bba32ce
font_01_sfnt_off00008345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8345 9972 bytes
SHA-256: acdf640fa7bacac91dfce3d697eee4baf9bada72f94c3d950d5d7682b8ac99b7

Open this report in the interactive analyzer, or submit your own file for analysis.