Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff217140cb12727…

MALICIOUS

PDF

43.3 KB Created: 2020-10-04 21:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 19b87e14199f5bc31a833ff934852e0e SHA-1: bf93f24854595337226222e11467926dd4d6e537 SHA-256: 3ff217140cb127274e2617a698e58c26ae3e0852203bcf016eb362153d5b4475
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://ggtraff.ru/strik?keyword=atlas+obscura+pdf In PDF document text
    • https://site-1036861.mozfiles.com/files/1036861/99737231659.pdfIn PDF document text
    • https://site-1036734.mozfiles.com/files/1036734/97253548354.pdfIn PDF document text
    • https://site-1037251.mozfiles.com/files/1037251/makigajukipa.pdfIn PDF document text
    • http://files.calclugston.com/uploads/1/3/2/6/132695698/magevovopebufir_roruzuvax.pdfIn PDF document text
    • http://bubesezeg.waverail.com.au/uploads/1/3/2/7/132740515/mowibo.pdfIn PDF document text
    • http://files.friendsofswedehollow.org/uploads/1/3/1/0/131070883/12cbe4f0.pdfIn PDF document text
    • http://files.whattowearinlondon.com/uploads/1/3/0/8/130814030/5633720.pdfIn PDF document text
    • http://fuxibevew.scandinavianmom.com/uploads/1/3/0/7/130776659/683764.pdfIn PDF document text
    • http://files.excellent-journey.com/uploads/1/3/0/8/130814873/bf49a4cef0.pdfIn PDF document text
    • http://xazidelug.preppantherplace.com/uploads/1/3/2/3/132302868/1542293.pdfIn PDF document text
    • http://files.zbfc.org/uploads/1/3/1/8/131871698/jexewulawa_fosalilujabam_sonikerasal_sekem.pdfIn PDF document text
    • http://files.janellrubyoga.com/uploads/1/3/1/3/131381799/rijazavanogewozifa.pdfIn PDF document text
    • http://files.lutaoning.com/uploads/1/3/1/0/131069992/vanula.pdfIn PDF document text
    • http://luvisorig.ginijanedesigns.com/uploads/1/3/1/3/131383791/1519619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B89 5276 bytes
SHA-256: 0e343b9721bd1f3e4d38e67c180cbbd8fa025a4a8f57dce33752a750cca1c2ad
font_01_sfnt_off00007d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D82 10352 bytes
SHA-256: 885c9119ad89529c28176400545e8fc740603e6dfb44ba388b80a9021aabaff0