Malicious PDF — malware analysis report

Static analysis result for SHA-256 443682ca360e83dc…

MALICIOUS

PDF

46.7 KB Created: 2020-10-08 01:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a472563487a8205b960345ade8ce77a0 SHA-1: 5d2b632ac1ec2b5e9288ca687280a34978ad8e03 SHA-256: 443682ca360e83dc4c231f64a72b7ec72c7ebb777c368149ba569fb0d3dafe25
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://gettraff.ru/strik?keyword=el+boligrafo+de+gel+verde+pdf+gratis In PDF document text
    • http://marizes.bridgesofhopetx.org/uploads/1/3/2/7/132741181/3316335.pdfIn PDF document text
    • http://files.nationalhellenicsociety.org/uploads/1/3/1/4/131454383/gugef.pdfIn PDF document text
    • http://nekal.sweetanniecandy.com/uploads/1/3/2/7/132712127/3390aef6.pdfIn PDF document text
    • http://nofogaxa.goldcrestpolychem.com/uploads/1/3/1/4/131452838/8a558a2cb6b40c.pdfIn PDF document text
    • http://files.adventureguidesaustralia.com/uploads/1/3/0/7/130775002/812f1.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/f9b2823f-807a-4a43-873d-f16a45cfee40/situdiromuwikepir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98184ca-976d-4c73-b369-d9101c317a78/nileze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a82dd1-f1e5-4cf8-8765-108a0e280a93/94275693669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2053d4b-7eaf-4dfb-879d-c3ffdecf2835/dujomutejowuzedabun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be04dc0-79f2-44b3-82e9-9b97a6bb8320/jijolajugixibesirawepid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c3284c-af23-4900-b447-4415292a1c9a/68367132705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45fe6c9-0a9d-4974-97f2-226e374a745e/99570064567.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF4 5368 bytes
SHA-256: 4c94ddc57deb0c3fa94c750cbfdb0232280618ae1c5e5d19dce7df29c597680b
font_01_sfnt_off0000714d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714D 11656 bytes
SHA-256: 94ad213dc27ef00ccabeb9774854f3217e8c45268bf533f0f1b087b9d2c02717
font_02_sfnt_off00009782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9782 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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