Malicious PDF — malware analysis report

Static analysis result for SHA-256 0389a25da14818b0…

MALICIOUS

PDF

43.7 KB Created: 2020-10-05 05:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: af5d65ac12e9a34f381cbb11db62b769 SHA-1: 637b507cd917a3f9d8111ab3e04bde24f12f89c4 SHA-256: 0389a25da14818b0f95ab10070562bcb5af630e33eef586a1d1f1d42070e96a2
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=antecedentes+historicos+de+las+carreteras+en+mexico+pdf In PDF document text
    • https://site-1042007.mozfiles.com/files/1042007/99747763428.pdfIn PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/najubex.pdfIn PDF document text
    • https://site-1040974.mozfiles.com/files/1040974/88216346588.pdfIn PDF document text
    • https://site-1039797.mozfiles.com/files/1039797/lologisewulasu.pdfIn PDF document text
    • http://kutokap.everwindsaintsandbeagles.com/uploads/1/3/2/3/132303382/6747675.pdfIn PDF document text
    • http://files.wildwellnessguide.com/uploads/1/3/1/6/131607565/6339750.pdfIn PDF document text
    • http://files.rivertothesky.org/uploads/1/3/1/8/131856919/rigakebon_mulejib.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/9dfdae81-dd09-4ee8-af2f-3bbfc2ef26d8/sezusutesozagowigogipufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12dffe5-fa7a-48e5-a09d-4bf0061b70c5/motenuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/898506f8-2811-4d00-82d7-c6381642bae3/70186785377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52128b53-0c28-4eb2-8bc5-0c0ed8a74633/60439857708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0570/5374/files/pyle_7_in_dash_touch_screen_car_stereo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1296/3482/files/athearn_blue_box_handrails.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8888/5400/files/88540400201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3421/4051/files/hp_manhattan_gold_ci5_review.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_off000069fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FD 5452 bytes
SHA-256: 864279df85f70373ab75f9cd1a19def277928ad52d06be8373ed1f9b89153cda
font_01_sfnt_off00007c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C63 10664 bytes
SHA-256: 90bb6f9bd2e5adbd32ff981b956af39cbf9c512f125b6b241fc3f94f85472b51

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