Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4487fa1a7096cb…

MALICIOUS

PDF

42.9 KB Created: 2020-10-15 06:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 6f43644341989941a960102dace8072c SHA-1: 6749bd4b2f687660e2ba52ad519c96c84b1b4967 SHA-256: 8c4487fa1a7096cb1f4cde66f62ad41fef3ec2206b3e394f1091b3e3ceecb340
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=belajar+membaca+tk+b+pdf In PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/vezorafiruxu-wenut-nelupuvamoda.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/nusirujajavokebim.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/jesozitufas_bareradikakap_zopan.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/1405612.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/jinitorip-bolag.pdfIn PDF document text
    • https://site-1039319.mozfiles.com/files/1039319/43556830700.pdfIn PDF document text
    • https://site-1042607.mozfiles.com/files/1042607/wekipigadeza.pdfIn PDF document text
    • https://site-1037142.mozfiles.com/files/1037142/wavizorunipijugi.pdfIn PDF document text
    • https://site-1044291.mozfiles.com/files/1044291/vudasumasezofenetamig.pdfIn PDF document text
    • https://site-1038382.mozfiles.com/files/1038382/33634785907.pdfIn PDF document text
    • https://site-1038575.mozfiles.com/files/1038575/samurazumebunomokepawef.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/vaxaki_jemevax.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/gevoderovepiru.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/9027445.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/3613b476-5c91-4d65-a934-5fceecf0c2f0/25591752717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5214408-adbe-435f-b0e3-ed508062e733/43866194777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3925c87-e6b6-487d-a0f6-be4ae1c6810b/bedigageranozefapup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1088ad1e-6a09-494f-a875-6fbd83f236f9/48682068992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2294/4922/files/universal_laser_systems_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3840/6806/files/icd_10_gastroenteritis_due_to_food.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1079/3382/files/ffxiv_gysahl_greens_npc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9657/9489/files/tagukivadukasagijalu.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_off00006a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A06 5452 bytes
SHA-256: 22b045be012c386c9e332efb6da644cb296e18afda2bff9c57da913685a34381
font_01_sfnt_off00007c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C80 9852 bytes
SHA-256: c5e734b741534b7c007d333d21d93102d5bff7e965d09ea5dd22dbd9ebfa31f7

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