Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a32d10c933416d…

MALICIOUS

PDF

52.5 KB Created: 2020-10-10 16:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d1dbb45f476ef9674189c34b2ae86251 SHA-1: 347f5b90505e6867aefd33c8052173d10fa898ba SHA-256: c5a32d10c933416d028c275ae658a3b7082965065b521b81ee7f987c30a04723
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://ttraff.link/pify?keyword=hollister+size+guide+mens In PDF document text
    • http://zizog.womenintrousers.org/uploads/1/3/0/8/130874050/gimililer.pdfIn PDF document text
    • http://files.predentalsocietyatucsc.com/uploads/1/3/2/7/132712489/a18bbe63ed36.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://uploads.strikinglycdn.com/files/e22c733e-eaf5-40ad-845d-21ed5e32214e/18478086712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf1f497-4cf7-4829-b975-17364a02a866/55357762833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1e3400-7205-4fb2-a1d6-a8e3d4662af7/xikiluvani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d36b5ba5-e04a-4cfb-a1ee-40094e4369cb/15835484700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b56128-9407-4104-9c95-84a099b28299/76129274036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c6fcd5-97d6-4656-991c-d09d8d4dd288/8243294365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb72bff-3f03-4017-bb6b-d759ccf50abf/kurujixutaramute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f649d28-a190-463c-9cb2-8e98f04db259/38556800634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/spice_it_up.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4349/9677/files/wopegodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/pipexewegewogomolumos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7883/4586/files/llanas_agudas_y_esdrujulas.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_off000064e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E3 4828 bytes
SHA-256: 28b6a446c309e0eee3386a3f7789f67210d602bd5e9e9b6d6e7a59f35783beb6
font_01_sfnt_off00007534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7534 14180 bytes
SHA-256: 79c02587366b637e1ef18165de92019846af849c90602f368727b4c52157d71f
font_02_sfnt_off0000a21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA21E 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
font_03_sfnt_off0000b6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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