Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdab84dcdd935aa…

MALICIOUS

PDF

51.9 KB Created: 2020-11-04 10:18:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 824f8722d0e9968e78e144195d5ce9e2 SHA-1: 24a88e2b682681941f5739702a4e6d439f53eef4 SHA-256: afdab84dcdd935aabd36661961fc82b323ac6ee3ef0e0536aa2952ec6e40e498
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=calleigh+duquesne+csi+miami+actress In PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/b2aff066d6a19.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/kitodobamakumekufa.pdfIn PDF document text
    • https://jifurutirijiguj.weebly.com/uploads/1/3/4/5/134528482/8399778.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/adc18623.pdfIn PDF document text
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/60e3588f0601a.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/b919b1ed8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422643/normal_5f9d14d8800e2.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/dedejexefulam.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://bepupigo.weebly.com/uploads/1/3/4/3/134317889/gananatofakuma.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/3576377.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/bikalepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/48650122606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2700/5094/files/supuko.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/67363741962.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_off00008b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B42 5384 bytes
SHA-256: 81c7d007a4799d893a2a5b4341559e06c7a2f74bebead6fe3b194fa7d3b67bd8
font_01_sfnt_off00009d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D57 10884 bytes
SHA-256: ec581ae1151d88f257c72981ae696a6324a7ddf0737009040314c3729e07e41b