Malicious PDF — malware analysis report

Static analysis result for SHA-256 13fd2e0ef5d0c17f…

MALICIOUS

PDF

46.0 KB Created: 2020-10-16 04:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e5564472a38a637fb30a11719a9e1dfa SHA-1: 981c29dd508ab76928db42e35fb2bd8ff15ba098 SHA-256: 13fd2e0ef5d0c17fdc62b42a76a21d10caf8d40ac5f9080ea79f660e76f09911
194 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.
  • 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.
  • 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://gettraff.ru/pify?keyword=fluke+1735+power+logger+analyst+manual In PDF document text
    • https://site-1043415.mozfiles.com/files/1043415/telegram_plus_apk_for_android_2_3_6.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/xokupi.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/bigusak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8727c7ddab8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5f8859d683b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8715101d8ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f8751ec80674.pdfIn PDF document text
    • https://site-1042023.mozfiles.com/files/1042023/ridijoluf.pdfIn PDF document text
    • https://site-1045346.mozfiles.com/files/1045346/14248261839.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/591189cb-5c6f-4de8-8f65-7b5171bf91d4/96423999891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b3fcf8c-3fab-4f40-a5a0-78bc7acc1a79/sawopekomera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffb101b3-f0fa-4bb9-b44b-0c2f1212bb9f/zopaxone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c96243c-5365-4ea8-b847-4d1cac1043cb/65688282992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d78312b-9ebc-452a-8781-5353fda9fff7/goxabaxuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f226d60-bbb1-48c8-a949-336eba566379/xidenewamefax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8bf2ce6-8b5f-425a-83e0-27abca57afad/38284075864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db138a0-2b14-4646-9702-d319a253ee0b/logekopawepimugomixifavul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8f3d74-ac84-42a4-a2eb-41346f424b03/xosisutusotarezeguvilibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2ee385-96ef-49c6-bf72-6b4926e6942e/62019545788.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000667e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667E 5608 bytes
SHA-256: dbe1074d883391d6f2f8f2eac06f2b92a1fbff3a0f4e298cfe25a3e2b8cdc7b9
font_01_sfnt_off000079a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A0 10308 bytes
SHA-256: 5dee12c4497aea4e93868f4e73d8a2f4181198ae221d971692c3a67879d21a82
font_02_sfnt_off00009ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361