Malicious PDF — malware analysis report

Static analysis result for SHA-256 605e1a67be262c81…

MALICIOUS

PDF

41.1 KB Created: 2020-11-07 17:52:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 8f9389481703a0de62ae43c15a7e12d5 SHA-1: 277fbe40398010dc26564fc90afa6debac6671a3 SHA-256: 605e1a67be262c81d4c92326cff1af3274db33624d8aed245b049433583f3f2f
136 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/aws?keyword=you+should+be+a+witness+lyrics+antonio+clark PDF link annotation
    • https://patekakedosejot.weebly.com/uploads/1/3/4/4/134479085/pakufulafozunena.pdfIn PDF document text
    • https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/454f595696d3fa2.pdfIn PDF document text
    • https://mokekisinuru.weebly.com/uploads/1/3/4/3/134366850/xaguwinupomonamos.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/1103908.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eae273a3-9ea0-4458-b618-23300ba366ec/61051878254.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/arjuna_classes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a0cfac-b435-4018-9fa1-c5cf2bd0426c/vogumirexenuwuzamino.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/can_t_let_go_geometry_dash.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/dispositivos_de_almacenamiento_secundario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657da983-7978-4c99-bbef-9a4633a225ce/sadokapibezumajugoj.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/libro_enciende_tu_cerebro_gratis.pdfIn PDF document text
    • https://guveker.files.wordpress.com/2020/11/pefolelotozidet.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/my_tutor_movie_wiki.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_off00006089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6089 5384 bytes
SHA-256: bc2bbfe613f61e6322fdcdef3183ef110d61f1230e7e2bd36e431491c45d4174
font_01_sfnt_off000072e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E6 10736 bytes
SHA-256: c19dfa5f63be6206c00df305ede351b0ef24a886c487baf58a509ee4f42a97f7