Malicious PDF — malware analysis report

Static analysis result for SHA-256 711b3cfbda8f4f03…

MALICIOUS

PDF

52.4 KB Created: 2020-10-03 13:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a360b6e60910b44d3b69f53df27daf54 SHA-1: e4229f6d3f94a2777148260ed2211d60f08c647d SHA-256: 711b3cfbda8f4f038ccba01ee107264da50aa70995926a9ad6e15c6bb6712ddb
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=cpm+integrated+math+1+answers In PDF document text
    • https://site-1036696.mozfiles.com/files/1036696/4799888572.pdfIn PDF document text
    • https://site-1038768.mozfiles.com/files/1038768/kadizovak.pdfIn PDF document text
    • https://site-1037175.mozfiles.com/files/1037175/gurufekibabol.pdfIn PDF document text
    • https://site-1039428.mozfiles.com/files/1039428/18915759975.pdfIn PDF document text
    • https://site-1037889.mozfiles.com/files/1037889/tezoz.pdfIn PDF document text
    • http://files.bakerval.com/uploads/1/3/0/7/130739103/8743323.pdfIn PDF document text
    • http://files.gigiaroundtheglobe.com/uploads/1/3/1/4/131407734/1fa1b.pdfIn PDF document text
    • http://pezilozo.flooringtradesales.com/uploads/1/3/1/4/131407045/8475811.pdfIn PDF document text
    • http://nomebevav.mjfk.dk/uploads/1/3/1/8/131871516/buduzururomiba.pdfIn PDF document text
    • http://fepeka.melsellsparadise.com/uploads/1/3/2/8/132814930/botatiso.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/4fad4ccb-67fd-4e3b-909b-9daf74866974/sipusivomalizikuzavodeluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d03e1a-7fa5-4d84-a09c-6e820fd50896/juwegilozuputa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5700e433-11f2-47d8-ab8b-4cd64ba86000/65782857197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2008a06-3be6-49e0-9dee-e0ab7d0b1131/penofidemudodowegaguxelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88061348-1b79-4550-89bf-17b170ffeacb/66641344864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9237/2381/files/anime_girl_tongue_out_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/decolonize_your_diet_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/43484256662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6381/1999/files/political_science_101_book_class_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6238/6074/files/54651050132.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_off000084ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84BA 5388 bytes
SHA-256: 08c3e3d70c5b0986a7decf0efbedfb8cd21b57e756b9182603ba17b4ad9b27c8
font_01_sfnt_off000096f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F4 14752 bytes
SHA-256: bd93b31be6a1e4daeadacf72778f4d8d6c8d37a0cee9d454bafb49a7ea5a25d7

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