Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c82fa5b9823546…

MALICIOUS

PDF

45.7 KB Created: 2020-10-11 09:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 5fcb785086d08c1da34f977f92c0bce0 SHA-1: 56eb4f6df4b5ad3a9167fc0df3cfcd3cc170110b SHA-256: e6c82fa5b9823546ee15f92b8b6151014054c9dfcc8256297e7898ef6adb6e84
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=islamic+calendar+1442+pdf In PDF document text
    • http://files.mrsberthaosclassroom.com/uploads/1/3/1/6/131606188/mugokupe_watigigij.pdfIn PDF document text
    • http://files.thepuginsociety.co.uk/uploads/1/3/0/8/130814706/3bcf48b62b2e09.pdfIn PDF document text
    • http://sekewez.wamuranstanleyrivercricket.com/uploads/1/3/1/4/131437914/bdd44.pdfIn PDF document text
    • http://files.parkerdreves.com/uploads/1/3/2/6/132682790/73384060114.pdfIn PDF document text
    • http://jogut.finnegansfieldsgypsyhorses.com/uploads/1/3/0/7/130775818/8705483.pdfIn PDF document text
    • http://files.wembleylodge.com/uploads/1/3/0/8/130873902/kaximujironelepexibi.pdfIn PDF document text
    • http://files.overlandparkcabinets.com/uploads/1/3/0/9/130969301/libafopugurobijoboxo.pdfIn PDF document text
    • http://files.rivergurus.com/uploads/1/3/1/6/131606331/fukod.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/c9882fbe-8296-4274-85ba-c5f01ef557c5/supadatapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66602aeb-edf0-44c3-86cb-9ac0f89beb30/80662570491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/mobobalajavuvibenopinux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6555/2295/files/autorap_mod_apk.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A3 5512 bytes
SHA-256: 431bf397eab09d83e2975295d79f990f13bffe842697d9ae680602c0b66e4255
font_01_sfnt_off00008449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8449 11672 bytes
SHA-256: 8b10f7a0fde4ea47a9d73785380982bad734885b153212985b63415cfc19335c