Malicious PDF — malware analysis report

Static analysis result for SHA-256 a187c141b2568ad1…

MALICIOUS

PDF

41.7 KB Created: 2020-10-01 02:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7d1f2f0ea7c043979f63dd60d1c75f6f SHA-1: 1644182dc79ff267aed9a4f427a3db635886f97a SHA-256: a187c141b2568ad1db376f23492e54cdcb8e4e221da83b901b0c92eac9722fb3
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=beyond+bigger+leaner+stronger+workout+plan+pdf In PDF document text
    • http://files.coflats.net/uploads/1/3/0/9/130969986/842ed3ac597.pdfIn PDF document text
    • http://files.everythingmattersfilm.com/uploads/1/3/0/9/130969562/a1468dc97.pdfIn PDF document text
    • http://gurisep.bookscapes.co.uk/uploads/1/3/0/8/130814328/9cf3704d54bc.pdfIn PDF document text
    • https://site-1037044.mozfiles.com/files/1037044/vewezu.pdfIn PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/88673203982.pdfIn PDF document text
    • https://site-1039719.mozfiles.com/files/1039719/timodujitegejugejinaf.pdfIn PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/65034373533.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/47472077488.pdfIn PDF document text
    • https://site-1038578.mozfiles.com/files/1038578/wisaxidinugelesadekigen.pdfIn PDF document text
    • https://site-1036950.mozfiles.com/files/1036950/tudatibexigufawa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/xopogido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/gajofotamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/vejuzekiwegekosonuzipize.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DE8 5656 bytes
SHA-256: 6b715ef88f68fec8e530b15e5f4267bfa803ccd425ec270ff4b43fd7040acadd
font_01_sfnt_off00006153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6153 10380 bytes
SHA-256: c8d26b89336b30603732f7920c9ee80603df21282fe9f86b5be79403af1bbe6e
font_02_sfnt_off0000850d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850D 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f