Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c667f09834aa48…

MALICIOUS

PDF

66.4 KB Created: 2021-02-24 06:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b078ac76f92a786ce8ba2c4fc947c087 SHA-1: a3a2b9344d01caa985abf3823f49f2722fedd082 SHA-256: 18c667f09834aa488b4e7c1198f38f6957d3bcc9704794d7d1a5f49c74171fa4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/aws?utm_term=how+to+take+battery+out+of+rca+tablet PDF link annotation
    • https://vubopedu.weebly.com/uploads/1/3/6/0/136083963/4842986.pdfIn PDF document text
    • https://dewosuto.weebly.com/uploads/1/3/1/4/131453399/jisejixav-kurusogoxupoxev-bivoxazafifid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467589/normal_5ff24a3b758af.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/kopanim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403688/normal_5fee4755de379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5fe6a1355906f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_602cac3cc6b69.pdfIn PDF document text
    • http://help-copyrighteamservice.com/world_weather_clock_widget_apkr777k.pdfIn PDF document text
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/522ac52b62eb535.pdfIn PDF document text
    • http://linukevaduze.iblogger.org/axis_camera_station_5._12.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/pizexopenaxu/addendum_pathology_report.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/cyanogenmod_installer_per_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/6249281104.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/classroom_words.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/2005_nissan_pathfinder_transmission_issue.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_off0000c542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC542 5056 bytes
SHA-256: da8d777b3cf1b7dd0d68955066be1ed1380c6a35025933385977de3cbb83a929
font_01_sfnt_off0000d6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A3 11160 bytes
SHA-256: 57af4ac60e2b4eeb8e4ee6da112195a63dcff661ee31e53f684276509c26dc02