Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe50cbccf63c6f0…

MALICIOUS

PDF

77.7 KB Created: 2021-03-21 03:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d3812452d94a199bfcfa173a8c75620b SHA-1: b1d7897935bb1c4266dccab0bc785fc3eba2ed67 SHA-256: bbe50cbccf63c6f0249377e3e42930f2bd6ab6667b42ae116f7c32aa16899c90
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many pointing to SEO-optimized PDF hosting sites, suggesting a link farm or phishing lure. The presence of a critical ClamAV detection and ML flagging indicates malicious intent. The document's structure and embedded URLs are consistent with attempts to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://seumenha.ru/award?keyword=amina+al+mufti+book+pdf+somali PDF link annotation
    • https://cdn.sqhk.co/sevijeruba/ihkhijj/wurarapolufisef.pdfIn PDF document text
    • https://lokamafurixese.weebly.com/uploads/1/3/4/5/134509290/sarali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_604b42b4b434c.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/cZijJjc/7261593301.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/25654745049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488809/normal_603b3eb8bb419.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389108/normal_5fefa13828c36.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/kinovitimazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_6041ecb9e7ce0.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/cmJjiAL/sudawisikizaki.pdfIn PDF document text
    • http://paselon.getenjoyment.net/76757535780.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/jghdgha/92962522668.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/50300561575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454435/normal_5fc7b448602ed.pdfIn PDF document text
    • https://nolujamikudaze.weebly.com/uploads/1/3/4/8/134868466/zemuwiwonameza.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/pegek/52075637908.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/7591582389.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/zabilutagutipabu.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/capitulate_noun_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/zamopexizam.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/hisense_air_conditioner_remote_control_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/91015573716.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/importance_of_critical_thinking_in_nursing_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/88690525783.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/76699042505.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_off0000e9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FC 5284 bytes
SHA-256: 8ba5765c208f312351032272df1548d6d027dc18d5e562efd97303a110f5a1b7
font_01_sfnt_off0000fbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_02_sfnt_off00010519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10519 10572 bytes
SHA-256: 2beb06e0d51ba4721c3cb13f94a45e68c60fee3803e106a0ea2103b99ad53ff4