Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7f56ab15ec7434…

MALICIOUS

PDF

41.2 KB Created: 2020-11-09 16:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: b506aad6b55d69d3c9649e694fac11cf SHA-1: 70db48f7a7c2a6d7db0f483be209fc6d29c37615 SHA-256: 7c7f56ab15ec743481ee6a28c8fee7c50d27a4a6fe1fe17bfd9ba6ee5250004d
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/123?keyword=st.+dorothy+prayer PDF link annotation
    • https://xitonodulamet.weebly.com/uploads/1/3/4/3/134307836/0ac86802c80a6a6.pdfIn PDF document text
    • https://pudufanosi.weebly.com/uploads/1/3/4/3/134324904/476340ffe6dd89.pdfIn PDF document text
    • https://pasuliwipo.weebly.com/uploads/1/3/1/4/131452824/289524.pdfIn PDF document text
    • https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/5112878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_5fa8df6dd0fcc.pdfIn PDF document text
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/9261825.pdfIn PDF document text
    • https://gimexewevojux.weebly.com/uploads/1/3/4/5/134523505/lubujakipirime.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/bejideba/sedoxun.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/montana_state_nickname_and_motto.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/42636313133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db2737c-e0a2-493e-b67b-cb186ccc90de/47300692997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df133332-0c9b-4c62-881b-f010a713d24d/texas_railroad_commission_gis_maps.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/tixomovovelusetofo.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_off00006448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6448 5072 bytes
SHA-256: b5bb4d5cd835149e94e6cf00f6efa04154c30e2b7a688439cde17cb7f7b56b89
font_01_sfnt_off00007592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7592 10140 bytes
SHA-256: ae5e1a55111371df1f351936c6c701b037e997275f28e92437174922ef372d78