Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5c0e38bd9467a3…

MALICIOUS

PDF

56.3 KB Created: 2020-11-05 22:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 7dcb48d63aa411e30f44652b558fbb6b SHA-1: 629d9656e890e0d4b10d2ce27a3317cebc8399bb SHA-256: 0a5c0e38bd9467a3eb2b20dd09605f75edf54e12f235835ec5c1e4f4a9384a36
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=how+to+get+adobe+photoshop+for+free+2020 PDF link annotation
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/vefikikenud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f8b68fac7651.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
    • https://pewoxunoxosizix.weebly.com/uploads/1/3/4/3/134318290/3cc508068c6.pdfIn PDF document text
    • https://luwamagol.weebly.com/uploads/1/3/4/3/134375262/vasetaduver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f914e91f1a8f.pdfIn PDF document text
    • https://jisogixisizula.weebly.com/uploads/1/3/4/3/134328009/pesadegotu.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/vikukinumet/51066807282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42573d23-c2c3-4e75-910d-ae1fca0b33f0/peavey_6505_plus_schematic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea0c8a4-b2ad-4186-b6dd-ad2c651c87d4/jisumakudemugafopebe.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/nanujenibadifaboz.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_005_off0000a67b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA67B 26144 bytes
SHA-256: 97757791e4512de01b691b15f162e82ce8e3c9adbdc14bf072918e5c83fee0f7
font_00_sfnt_off00006e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E83 5740 bytes
SHA-256: de82c29db88d43f4afbf0b009e6176eabcca55d6a3e53dec439a6bacb8675464
font_01_sfnt_off00008219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8219 10656 bytes
SHA-256: 87e27de7d4c635ae640406463aca846e4e451f159b1f24dfc6b547def5d04005

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