Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9aaaeed1f914436…

MALICIOUS

PDF

74.3 KB Created: 2021-03-17 06:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 00aca430ef467b6f30b58389a2c318f5 SHA-1: b00f2f39338af8ac37b1defc1e9677216a4d7184 SHA-256: e9aaaeed1f9144365ff6bc453470be553010b56d801c4fc18dba5d476c6066ef
196 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a significant portion pointing to SEO redirectors and potentially malicious domains like fokemale.ru. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of links designed to manipulate search engine results, often used in phishing or malware distribution schemes. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=antecedentes+d+d+5e+pdf PDF link annotation
    • https://cdn.sqhk.co/vedanoderifu/jyeicgf/87975686611.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/gSfjOBX/angel_stone_rpg.pdfIn PDF document text
    • https://cdn.sqhk.co/xenaporo/hrw7Uk3/zitogopakaputokafezameniv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458854/normal_5fdbe179e0700.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/igcse_biology_revision_booklet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384821/normal_5ffefa4f976ea.pdfIn PDF document text
    • http://nijewogifuzazi.mypressonline.com/aviation_mechanic_handbook_dale_crane_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/how_to_look_up_a_citation_number_in_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/airtel_tv_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/possessive_adjectives_exercises_intermediate.pdfIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_b91598cb511944e493521ada4d4c816e.pdf?index=trueIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_9106d2650b1e41b2977020ee7ab4c186.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/lagu_waktu_yang_salah_cover_audree.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/16943659180.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/shawn_mendes_senorita_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/sakagurekak.pdfIn PDF document text
    • http://xemigososefof.atwebpages.com/how_to_use_my_oster_steamer.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/46411612176.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/mobile_legends_adventure_hack_apk.pdfIn PDF document text
    • https://9e2901ea-5d25-41a5-867c-54d0774c6e48.filesusr.com/ugd/4d0f37_9bcc1bd59b6e4b83b5ee0deb7a955e06.pdf?index=trueIn 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_off0000e3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CF 4924 bytes
SHA-256: 3b013f580d8755219fa337dcdbb508bdf118e1b312b0f83114fcf7c02fb8b064
font_01_sfnt_off0000f4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B6 11688 bytes
SHA-256: bdc1b97d22aeb0c8ed19cdcf9a6279eef59e3492b685decf76890b9ca90b65d0