Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a8912efa9046b5…

MALICIOUS

PDF

76.8 KB Created: 2021-01-26 07:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: bb9cefdbafac2845b61fa10e86e87035 SHA-1: 6c61f978d7d2164f43ce2e642a81bf4915d83fec SHA-256: 25a8912efa9046b5cd985685fc5c00228ac22eb2f26554362ce5fa2d8c27140b
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/123?utm_term=ghost+bride+of+dracula+uncut PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409602/normal_600c886600846.pdfIn PDF document text
    • https://xizenebijebis.weebly.com/uploads/1/3/2/3/132303300/zabibex-sogaxiporijutu-wunus-sajejas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366008/normal_6002e6b92d699.pdfIn PDF document text
    • https://kavavori.weebly.com/uploads/1/3/4/0/134012315/losiwewaru.pdfIn PDF document text
    • https://diziwupufetut.weebly.com/uploads/1/3/4/4/134477772/pudalezodujufuj.pdfIn PDF document text
    • https://koxawobe.weebly.com/uploads/1/3/4/5/134528326/satadaga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469841/normal_5ff4da74e7f00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_5fe088708ed7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407057/normal_5fc7d559aca2c.pdfIn PDF document text
    • https://labatozun.weebly.com/uploads/1/3/1/6/131607827/gubosefiline_razipuxip_sanijubojunuvaz_domaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406228/normal_6003585137215.pdfIn PDF document text
    • https://nitelozam.weebly.com/uploads/1/3/5/3/135308565/5030844.pdfIn PDF document text
    • https://wusatotaluvak.weebly.com/uploads/1/3/4/4/134469206/roxejisesew.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/pirisupatap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zoribele.epizy.com/bairi_kangna_video_song.pdfIn PDF document text
    • http://fabodatutowew.epizy.com/keystone_report_definition.pdfIn PDF document text
    • http://zanutebuxeboluv.rf.gd/sijor.pdfIn PDF document text
    • http://labireninofut.epizy.com/css_code_formatter.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_off0000e737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 5280 bytes
SHA-256: f91fa8e6e8528586a68b120a354cfb9a2e1f1dc6deec5e09c382c5eeedad74ae
font_01_sfnt_off0000f922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 14180 bytes
SHA-256: bbe5b995f08cdbcafc89b93e2560cc014dfe5eda2e04ae47e15a55dcbbfd98c2