Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f2b368210a53c8…

MALICIOUS

PDF

43.7 KB Created: 2020-10-29 14:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 31ce6d2a2ce2508a1b1c38c1fb826fba SHA-1: aee7c9b75b607274596a571025768f3e1de36605 SHA-256: 53f2b368210a53c8f8d1ae1ed8d45f731b061facd3541596710e45b5396b4951
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/aws?keyword=ectropion+in+dogs+surgery+cost In PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/9c49e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_5f920f317b6d5.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/7481120.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/wigomedinazokana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_5f97243a6279e.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/312c5f.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/fodumakudelax.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006d69.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006d69.bin)
    • https://cdn.shopify.com/s/files/1/0496/1579/8421/files/polar_bear_vs_grizzly_bear_comparison.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/happymod_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2815/9381/files/43653675294.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/best_astrology_books_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1806/8383/files/all_my_loving_guitar_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6215/5195/files/regidogaxibamupekumuzimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8221/4301/files/wunoxafisujipedinolil.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 extracted file (font_00_sfnt_off00006d69.bin)

Related samples 6

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_off00006d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D69 5056 bytes
SHA-256: 2cd3b880f3380d0d8c8715b52ceadf7057d1ceed58f23087f79524c5b5e78bf5
font_01_sfnt_off00007ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBB 10248 bytes
SHA-256: 4580d297aedbbfb558953d6a821a08da80b1154e4a8cd881002cf96c458fb647

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