Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7aa7317eab75da…

MALICIOUS

PDF

53.0 KB Created: 2020-10-15 15:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c0f724f308a437caaa5736d8d68ab076 SHA-1: b96dac2c284c3bcfb4bbca26b57ec2d9701afba9 SHA-256: 9f7aa7317eab75dabb540e0c630205312a646d9b8fc0013e121a77ce1783b7a4
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=android+studio+emulator+sound+error In PDF document text
    • https://gituwere.weebly.com/uploads/1/3/0/7/130740556/268450.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/xojajuv-mitegejitokuxig.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/dbb6ae8863eb5.pdfIn PDF document text
    • https://jikolugoxolij.weebly.com/uploads/1/3/1/3/131379047/webapojo.pdfIn PDF document text
    • https://site-1040286.mozfiles.com/files/1040286/xemixovufevevijezubijoso.pdfIn PDF document text
    • https://site-1037048.mozfiles.com/files/1037048/mijofelegarule.pdfIn PDF document text
    • https://site-1045389.mozfiles.com/files/1045389/gutopanofijonevakonopi.pdfIn PDF document text
    • https://site-1043174.mozfiles.com/files/1043174/94472148940.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f870adbab1af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f875ddd27441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f87647b1ebdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f873db28e635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8754485e242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f86fed53b9f2.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/78717a59-dd3c-42a8-8e04-bab07c534402/3737472670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/725e0310-e6ef-49d3-9f5c-e913eeef982f/laxubedexotimiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eefe107a-075e-4155-be68-3c39a68eb288/latubamemukemuzunodewabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b38aa76-8e25-48af-83a6-3cc106bf7d37/fedovafesovudodib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa7d4be-7e83-47a7-b9a2-a8cdb41fdba8/88289836633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c514596-0ebd-48b3-9e33-bbe0452b8ce6/sokepalivilodikawovopapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc89594-5294-4c33-b718-3a8e27b6d78e/ruposaxobeme.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_off000092b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B3 4960 bytes
SHA-256: a6d23c996f9ccc5aaa8059079d19fa435ee223db28b627db17ce8d16d35bf74b
font_01_sfnt_off0000a36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA36F 10328 bytes
SHA-256: 6d7b641af0c7a177f4618fda54d2638d079a76f63a13d8d2552e63b2955294dd

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