Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5529e84b77b81f…

MALICIOUS

PDF

39.4 KB Created: 2020-11-07 21:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: a836c603921fc030c1ca85153d2df65e SHA-1: bd7c417da638a23d01a0395ec483d1e9ee1f6290 SHA-256: 8e5529e84b77b81fdf972d1b3850eed27d4bca17b8ef14d9e597d6afb29b951d
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://traffset.ru/aws?keyword=snap+on+mg725+boot PDF link annotation
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/7201025.pdfIn PDF document text
    • https://zosopomejunij.weebly.com/uploads/1/3/4/0/134040517/2777568.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/7820597.pdfIn PDF document text
    • https://vipapesad.weebly.com/uploads/1/3/4/3/134369303/4b843f7d19a508.pdfIn PDF document text
    • https://pudafakomixi.weebly.com/uploads/1/3/4/5/134506615/8513205.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.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/fd7bfbbd-f4ef-44d0-b7ca-e3543870fb6d/intelli_vent_white_rodgers_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/42503864029.pdfIn PDF document text
    • https://finasaz.files.wordpress.com/2020/11/33669283505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06affabb-4e20-4487-b111-768cb2056fd9/vadoradaduregipokimituku.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/gc_derivatization.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/wisaresepapatalenifiwen.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/congressional_debate_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/deep_portage_lake_mn.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/brother_xl_3200_manual_download.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_off00004d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D28 5036 bytes
SHA-256: 263829c8fb3e95d795abe4e98d8a502cd4a6db888e31d22af4c01c8d08c04a89
font_01_sfnt_off00005e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2A 10808 bytes
SHA-256: 15f356be62adcd3623e74dd8fc693e4f84d35351abc9719ae534a299c93373bc
font_02_sfnt_off00008300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8300 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2