Malicious PDF — malware analysis report

Static analysis result for SHA-256 1270c847d2d89b8e…

MALICIOUS

PDF

71.4 KB Created: 2021-02-16 21:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f16bb43c4c242a2bd9bde1300f23c4db SHA-1: 7e627c373657d1ea03135332ae06e3e473f91f0f SHA-256: 1270c847d2d89b8ea021f48cf6942ed214bcf5ca609b9d289093ff0cf935c59a
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=plant+vs+zombie+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5fecd222d807f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412763/normal_5fe3da2b3b9ef.pdfIn PDF document text
    • http://namedaun.fun/top_100_online_games_for_androidgukvg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5fdbb5291b2bf.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/zuvuz-mutodonoduvu-zodoniti-vixikubofatomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450896/normal_601d7029a7fca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_60277373e12ec.pdfIn PDF document text
    • https://cdn.sqhk.co/tofatuxurejo/Ep1Iget/e-_iva_declaracion_propuesta_f29_de_ivanho.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_60097629b4592.pdfIn PDF document text
    • http://kartaidatodemeleri.com/gramC3A1tica_inglC3AAsgjpv3.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/ifihYhh/romantic_ringtone_download_mp3_malayalam.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/Xjdaojh/13229491055.pdfIn PDF document text
    • http://soldonlakewood.com/14302781276mhhiz.pdfIn PDF document text
    • https://wamukefak.weebly.com/uploads/1/3/5/3/135324497/tuvomitenuvavak_ketevininowa.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/jenagubadopi/tft_item_guide_new_patch.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/autocad_2014_with_crack_utorrent.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/zobodazetu.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/android_sdk_26_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/double_replacement_reactions_worksheet_answers.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_off0000dcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAE 5184 bytes
SHA-256: b293eba52e40ed93fd304efc54a9378ddf8528ba0c9186b476572834e8df8e16
font_01_sfnt_off0000ee4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4D 10112 bytes
SHA-256: 59d7ea621b632924634f17b5b1585dfb2b5833e9794221fa96e8f595f55be757

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