Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7af6ac0efd039e1…

MALICIOUS

PDF

58.0 KB Created: 2020-11-07 09:11:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6154a8d81ec528169eba9c1a9620ca4d SHA-1: 79d28b99c4e8b163acc65930b1cad79bcb4dd0db SHA-256: a7af6ac0efd039e1c713fd4a20f04016e7c776a18660eba36e52c5983336b7ef
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://traffine.ru/aws?keyword=tangent+sum+or+difference+formula+calculator In PDF document text
    • https://tulalezosisab.weebly.com/uploads/1/3/4/6/134601470/dojubivijegom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f874d9d5045d.pdfIn PDF document text
    • https://kikuriniwabutip.weebly.com/uploads/1/3/4/4/134440093/175ef7052acff8.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/rifududimam.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/pimavo_nebixatipebad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5fa0a1b0497a9.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/sudurilut-jepite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427793/normal_5fa5acf537c58.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/nizibebolutejil_banifu_wavizadarifoko.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/5003d5cbc57e5.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/gavubodogelivufifo.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/tipufukoxobeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417033/normal_5f97234e89b86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_5f9877e99110b.pdfIn PDF document text
    • https://kutusavirub.weebly.com/uploads/1/3/4/2/134265758/2940590.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/2258e540-1cac-423c-9c01-edfe9a1e9c23/97943623695.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b37d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB37D 22280 bytes
SHA-256: 7676f140a21881ce8d268058663ecdc0af162457f5aa7875217b4c954cb749ca
font_00_sfnt_off00007a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A24 5288 bytes
SHA-256: c6061938ed2c7e1ab68cb7e80261a66b218713f9e0de13420e2e2da102dc852e
font_01_sfnt_off00008c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0D 11436 bytes
SHA-256: 852969c5cd74074f1f346184bbcaf8e6d3083a91514a109ca0ede73b7d6b4ac4

Open this report in the interactive analyzer, or submit your own file for analysis.