Malicious PDF — malware analysis report

Static analysis result for SHA-256 1974540e2fd7c3b1…

MALICIOUS

PDF

69.9 KB Created: 2021-02-27 17:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3737263392c252f240413a32945a0180 SHA-1: f78131370d8f677c7247f2436e3889d5034d20be SHA-256: 1974540e2fd7c3b169bcd9ac621217fccff6ab642e7ee37c4dbd9ee84b9a7c28
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://bedapidipofawif.weebly.com/uploads/1/3/2/7/132711979/nasonudoba-geniwujoluxuxo-xidoxitelimi.pdf.
  • 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://pelibifir.ru/award?keyword=how+to+reset+ipod+nano+7th+gen PDF link annotation
    • http://fanisore.sportsontheweb.net/84431351276.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/Lghwigf/dancing_line_2_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bupusudiva/jdibjg7/50993634234.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/19632016635.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/9Ykjhxz/paraweno.pdfIn PDF document text
    • https://cdn.sqhk.co/moxasapiwer/jbUaQje/dictator_mobile_ringtone_download.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/dd_wrt_router_firmware_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dojagomudek/hejavgh/kexatisetavafegugukopu.pdfIn PDF document text
    • https://bedapidipofawif.weebly.com/uploads/1/3/2/7/132711979/nasonudoba-geniwujoluxuxo-xidoxitelimi.pdfIn PDF document text
    • https://cdn.sqhk.co/jomutepe/ryNeidM/download_game_my_tiny_pet_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410414/normal_60313b6fa8c6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jijumupade/80386630523.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/nifowe.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/22946985602.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E4 5320 bytes
SHA-256: 3a23560d4b5dd6b5d2a15274fe5217e8d941130c046352573824a608fce650d0
font_01_sfnt_off0000e811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 10184 bytes
SHA-256: 622b922b8a76fa4aac239ed1c0954eb176144843729cee465ee505ac15e28f71

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