Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba5fa67fa9afa63…

MALICIOUS

PDF

67.4 KB Created: 2021-03-14 22:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea434bf01641eb4b46bb778c852860d4 SHA-1: a72cdd49eb0b6cc5705a19c9972bee38ca8faae2 SHA-256: 0ba5fa67fa9afa63eaba1162336c56ebfa166fdaaa0eb0b6478bb21331ab802f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to a domain associated with link farming and SEO manipulation. ClamAV and ML classifiers also flagged this PDF as malicious, specifically identifying it as a phishing or trojan variant. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/award?keyword=pronoun+antecedent+agreement+worksheets+pdf
    • http://wumomotetidofe.getenjoyment.net/lefez.pdf
    • http://pimesizawox.sportsontheweb.net/200_gramos_azucar_cucharadas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aab86c4b-104b-49d1-9616-9d275519f01b/a1c_level_conversion.pdf
    • https://uploads.strikinglycdn.com/files/3eaebf01-3119-4be0-b43e-af0ebfcacae3/femekudavutedomumapezoj.pdf
    • https://uploads.strikinglycdn.com/files/35499c5d-caaf-4088-8dcb-5a3c8029e7b1/38722224847.pdf
    • https://uploads.strikinglycdn.com/files/790937c3-71ae-4d5d-80cd-382ae1fddc83/hp_elitedesk_800_g1_mini_user_manual.pdf
    • http://sanugifop.atwebpages.com/15787902909.pdf
    • https://uploads.strikinglycdn.com/files/b65e07ab-0c6e-4fe8-b7ad-ec14bf429975/47211598558.pdf
    • https://uploads.strikinglycdn.com/files/710754d6-d4c4-4f4d-ac9c-d707bf80e93d/atlanta_nights_of_lights.pdf
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_e4cb9296e6b24ed2a8cf79a373d88712.pdf?index=true
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_3f02cf1b4b384628b0efd5d08c6caa34.pdf?index=true
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_490076ee5ab34cc38e077043bdca08c2.pdf?index=true
    • http://merovuditipin.onlinewebshop.net/risijimebifimesudesaz.pdf
    • https://uploads.strikinglycdn.com/files/f53b1a95-bedd-40f1-a1ea-ab35078c7fac/sukotazewuketogesoj.pdf
    • https://uploads.strikinglycdn.com/files/cafbec2b-8640-4369-81ce-3c25a3968c7a/jujezafubok.pdf
    • https://uploads.strikinglycdn.com/files/888e111b-2e22-47fa-8dab-61270356f5a0/aice_general_paper_discursive_prompts.pdf
    • https://uploads.strikinglycdn.com/files/b1d8caad-b01c-4e07-b473-bae5b396c405/robin_hood_prince_of_thieves_online_watch.pdf
    • https://uploads.strikinglycdn.com/files/9d52d75a-1091-4b7b-b1ee-0ee72d4f7149/zoho_social_media_login.pdf
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_3467308e3a774b588048b3bbaa967a02.pdf?index=true
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_84b5569b450f48ed8176be79c021a889.pdf?index=true
    • https://uploads.strikinglycdn.com/files/86bd4a9f-cb59-4ff2-b70a-3b477c0a2a28/82409836750.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a9.bin
542152bacf258e84f78690f9f3293cbc2230de6fa40dd0ddd88298c73124a7d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A9 5696 bytes
font_01_sfnt_off0000dcf9.bin
ce5ea35bf27da193d06d2be22f6cd706f571d3010cfb51d19b5766a4046f1b60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF9 10288 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.