Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd890404d0158ce9…

MALICIOUS

PDF

43.0 KB Created: 2020-10-05 10:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 850b6e86305d60ddbd61367622861b1b SHA-1: 80ca09c3e6fc71c431777ecfec5ca13e96eaf440 SHA-256: fd890404d0158ce92f9519407b5ba391b6cb70cf1d430bb303079f90abfd93dd
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=subtracting+mixed+numbers+unlike+denominators+worksheet In PDF document text
    • http://files.raulcervantesfitness.com/uploads/1/3/0/8/130813988/sinafazod.pdfIn PDF document text
    • http://nokikezi.mortarandpestleproductions.com/uploads/1/3/1/4/131437158/dosus.pdfIn PDF document text
    • http://files.laohalbany.org/uploads/1/3/0/7/130775249/4070367.pdfIn PDF document text
    • http://katujaxol.intentionalsurroundings.net/uploads/1/3/1/4/131482995/d6f7dee5687.pdfIn PDF document text
    • http://files.rallypointdefense.net/uploads/1/3/0/8/130874219/327637.pdfIn PDF document text
    • http://dusugifuw.bradleypmartin.com/uploads/1/3/1/3/131383581/poxakovitu_walopufokamab_wagujesa.pdfIn PDF document text
    • http://widab.orioleadvocates.org/uploads/1/3/1/6/131606159/77f0d.pdfIn PDF document text
    • http://files.naturaldisastercolor.net/uploads/1/3/2/8/132814958/5251199.pdfIn PDF document text
    • http://vemiz.covinavikings.org/uploads/1/3/1/0/131070357/788a09247314c.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/44dd72de-5a2b-431a-8835-3f5a5fbf1cd7/25629511968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76799745-b7ec-4005-93d8-e8db0676ebaa/38598556318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07f29d8-5de5-47fb-8582-7623ac3ab26d/voradesexajiwuwolujatixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315e198e-0057-4c14-8a95-81614d67af96/42065541701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1f643e9-1f75-437e-a481-c9d56c47eb93/1696447771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0456/9173/2127/files/wubosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/pdf_macbeth_folger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8696/2582/files/31003884270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/bogalupojej.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 3

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_off00006839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6839 5820 bytes
SHA-256: 457b1be84ae0fef85a27701da3f2bf4b72e7442722c575f6e06e39aa2a9771a8
font_01_sfnt_off00007bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEA 10000 bytes
SHA-256: ea29bca7cef8be5cb80cbe6bb1c91d49a80020dec609d28dc484da3d09b47c7e

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