Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e49c2fe2d79fab…

MALICIOUS

PDF

48.5 KB Created: 2020-11-08 00:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6cd8be7d05a8fd7e4e1b06da89bc1055 SHA-1: e51cf10f22b49e154c402d6fb37311fb21093a85 SHA-256: d4e49c2fe2d79fab50e80de45eebbbb941ec284c15845420a0e21f707d9cc9bc
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://trafftec.ru/aws?keyword=flame+test+lab+report+pdf PDF link annotation
    • https://gorigopaf.weebly.com/uploads/1/3/4/3/134341526/c02a39d5.pdfIn PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/luxuzukuboko_sujotaxaxifugel_liruso_lobizarawuritag.pdfIn PDF document text
    • https://lokapane.weebly.com/uploads/1/3/4/4/134464640/wujasokakuxevo-fudeki-medasufipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_5fa2cfb942ee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410952/normal_5fa4a423e087b.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://s3.amazonaws.com/tunenijexe/greenway_shooting_range_bozeman.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/capitulo_4_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/buferopotu.pdfIn PDF document text
    • https://zatejoru847961968.files.wordpress.com/2020/11/72489844693.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/56432096595.pdfIn PDF document text
    • https://zumuwuvebib.files.wordpress.com/2020/11/head_soccer_champions_league_unblock.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/what_does_wya_mean_in_text_messaging.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_off000070ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70EF 4916 bytes
SHA-256: b054320cbe9fb208abd8fdf211e4a6fa903f3ec58ec787b0056a8cb8a068b53d
font_01_sfnt_off000081a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A0 10956 bytes
SHA-256: ff9d26fba59c43bc9012645e1cea378d73560248abed978f99009fa5583ad4c2
font_02_sfnt_off0000a750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA750 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3