Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe80b9274be5856e…

MALICIOUS

PDF

94.0 KB Created: 2020-12-17 09:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 07975804c9be51e1769dcb4e003b8f31 SHA-1: 9d27ab732e9e9b619e06c5e1220649a9aace5f20 SHA-256: fe80b9274be5856e938e993531ed145d7a54eaec4a79d97cdd7a60d19a2b763a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/123?utm_term=complete+persepolis+pdf PDF link annotation
    • https://retelajipubo.weebly.com/uploads/1/3/4/7/134700068/fisomipotodabur.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/sezaxaganepe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zikeko/sales_rep_cover_letter_no_experience.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/assistive_devices_program_policy_and_procedure_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58482182-513f-4109-8750-2876d9d82968/witcher_3_delusion.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0672f60f2895dc1e54ab2/t/5fc1804761e25426e170ff29/1606516808206/behind_the_green_glass_door_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305a5c1d-d3d3-47ce-a766-3d3843c5bbfd/mogojonivipilofi.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/mann_buddenbrooks.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5925716f6d44b07de45cb/t/5fc6cd283ac9c763f4c30165/1606864168436/nisotitavakeres.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd449f8-42e6-40b1-8be0-2b766b17856f/semowoxusone.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/desh_bhakti_mobile_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/32221696970.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2aef80b6b03258f41001c/t/5fc55ad43c6ccf69f3116469/1606769366699/kulubud_daria_indir.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_off00012708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12708 4684 bytes
SHA-256: 407f4b295cf41508e4c7c791fe7095917a3008684d6784c38fa2a4b64d9d9551
font_01_sfnt_off000136f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F6 11548 bytes
SHA-256: ab2ae730e9f7b4e174f7feb4c391e1f5a33ed0086a9afb044fe4d53ed1c9e22a
font_02_sfnt_off00015d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D0C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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