Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a93b5e366755a65…

MALICIOUS

PDF

70.6 KB Created: 2021-02-28 06:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bca43341a4f1667dd654fde868cd8e42 SHA-1: 43527428ab4336bdf917bdae953286e33bbfd119 SHA-256: 0a93b5e366755a65f3f0a0fdb13892ede09c099b39a6171344c90458e211b0e9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/award?keyword=lycoming+io-320+parts+manual PDF link annotation
    • https://cdn.sqhk.co/gabamulijawe/giggKZv/smash_balloon_social_photo_feed_dsgvo.pdfIn PDF document text
    • http://copyrighthelpcentral.com/motorola_xpr_3500e_price71ok6.pdfIn PDF document text
    • https://vojanaxopij.weebly.com/uploads/1/3/1/4/131453451/5da17b8cf28.pdfIn PDF document text
    • https://jaketomerinojox.weebly.com/uploads/1/3/4/1/134109184/danogupaminobe_zolanajef_tarunu_lalowetulik.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/8D7mgcX/shark_tank_bug_bite_episode.pdfIn PDF document text
    • https://xipumizi.weebly.com/uploads/1/3/4/7/134746986/9252183.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/maxezokexowekotavo.pdfIn PDF document text
    • https://cdn.sqhk.co/vidikusupegu/kjgfhgE/3273761654.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
    • http://gerosopidazab.rf.gd/ansi_c_book_by_balaguruswamy.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/19227408876.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/address_change_in_passport_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/lorokenisobojisofeve.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/79007540715.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/showbox_android_tv_box_running_slow.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/73595480692.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_off0000ca00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA00 5528 bytes
SHA-256: ec8b6f7f275e8e31638a521617d824b2c5cfd02a7d655aa75e573e6298afcf8c
font_01_sfnt_off0000dcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB6 10228 bytes
SHA-256: bdbb68343c3275468f66602f9214f345a812b9ea31b5d4cefb07862b0d610f28
font_02_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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