Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef947a433e12e08…

MALICIOUS

PDF

49.2 KB Created: 2020-10-13 23:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f201ed4082359a47f15c9d4b54e12977 SHA-1: 258295c8133d5d16de7d8bd4ba6663db24f46894 SHA-256: fef947a433e12e082990838eb6556f77cef4196993f1db3c42a984d30e6d23df
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=telecharger+bescherelle+la+conjugaison+pour+tous+pdf In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7971455.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/bawap.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ramugimexixepaba.pdfIn PDF document text
    • https://site-1039752.mozfiles.com/files/1039752/96523730739.pdfIn PDF document text
    • https://site-1043809.mozfiles.com/files/1043809/bukujekarapun.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/54017fad-690f-4a48-a5d0-248abc72cc82/madowosuvavim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc09ca8e-8e36-48b2-94b6-156c98ea03ad/kilaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3dc5e5e-75a0-4fa2-b8e8-a0cfa47a8b65/70906115423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ae5230-d28a-42a5-975a-c6ce081809f7/tapajinixifofopojoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/numeros_mayas_1_al_50.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/jufedusujogibigezeluxaja.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2D 5584 bytes
SHA-256: b443929841e6dc442d2cf9f67e4bc2272547e1281fec979272c1632e6876bec6
font_01_sfnt_off0000901f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901F 11876 bytes
SHA-256: ee28695151ef1117684a77e396442ad457a49f1fc40ceafbc6ea0ab4ca21bac9

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