Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37fe5a3aa50afd3…

MALICIOUS

PDF

60.1 KB Created: 2020-11-07 18:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 9810f23d6801ca61a1ca5db3ec418aa3 SHA-1: 6454c70fd88bf02e2d4a8a5aa0b6a6fc0bd03971 SHA-256: e37fe5a3aa50afd38528503174a40175bf2c0ce8674b75b00450c596792c9345
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://trafficel.ru/123?keyword=team+tenergy+tb6ac+manual PDF link annotation
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/fazemekobadegubup.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/wodij.pdfIn PDF document text
    • https://tonurokekar.weebly.com/uploads/1/3/4/4/134456200/wijalewabaxep.pdfIn PDF document text
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/dda9261de1de.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/04d4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off00009407.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off00009407.bin)
    • https://fatalovit.files.wordpress.com/2020/11/msp_hack_no_human_verification_or_survey_or_download_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/sazololujinotoxubu.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/steam_and_leaf_plots_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/key_signature_chart_finger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c722aaa4-e4bb-4dfa-8af3-67c23f213a97/52108476307.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/vibid.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 extracted file (font_01_sfnt_off00009407.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_03_sfnt_off0000cdd4.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_03_sfnt_off0000cdd4.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8751 3532 bytes
SHA-256: 4d6921a4d698413368eb1dfd96960e3a77a3ae6eaa0503b897ac4586118e7ab6
font_01_sfnt_off00009407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9407 5284 bytes
SHA-256: 4e544f29a80069393663bb7fc8a3a24d1f1f80ba1747dfe7c928f7aa5dda03c2
font_02_sfnt_off0000a5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5FD 11592 bytes
SHA-256: 3b0a24617581c8dfe15c8d4897238093f858da9c63d6b17a1041a584c59da7b0
font_03_sfnt_off0000cdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD4 16260 bytes
SHA-256: d25a34a56be33791b66bd7dbe91ee772b39b89bee75ba0e64ef3ea6cb2c10b57