Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b4f3a6db3bb33a…

MALICIOUS

PDF

77.3 KB Created: 2020-11-18 04:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 09a1d8bc581c3be26aab033b096bdd08 SHA-1: d7ac7519e1b407ade14720b3da784420822a94e3 SHA-256: 29b4f3a6db3bb33a11f51162b7168714cb7e6170bb065c4a8ddcd22fbb8d9062
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 0.9997

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://traffset.ru/123?utm_term=tower+of+the+black+pearl+pdf PDF link annotation
    • https://vasedowazapen.weebly.com/uploads/1/3/4/3/134320052/5049359.pdfIn PDF document text
    • https://tarebizadutobi.weebly.com/uploads/1/3/4/3/134310067/jazopipuxipo_zadofazagedoruj_luzugufu_gewukovimirugod.pdfIn PDF document text
    • https://varavedonenen.weebly.com/uploads/1/3/4/3/134316352/zatofe.pdfIn PDF document text
    • https://momapepax.weebly.com/uploads/1/3/4/5/134594639/8942149.pdfIn PDF document text
    • https://wofuzokekaxan.weebly.com/uploads/1/3/4/4/134465278/betetijowubijag_silobup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fabac1b-761c-439a-8365-2a98bcfb8bcb/8808093538.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/zombie_train_unblocked_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiwovowus/island_of_the_blue_dolphins_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/520983f0-0334-4587-aaa5-7f7a33b1e3f4/diroped.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/aadhar_through_face.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/concierto_de_aranjuez_sheet_music_trumpet.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/strength_training_anatomy_third_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/47219540864.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/26771874317.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_off0000e2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 3496 bytes
SHA-256: 4c4798fb74f79f47459a0d2612197b4e21d1866cfb1bf38c417d1b8f66886166
font_01_sfnt_off0000ef4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4E 5308 bytes
SHA-256: 4df9287ce2871b1d21174093e7f0bdea371fa90ba83599f354cbf9427d632561
font_02_sfnt_off00010163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10163 11928 bytes
SHA-256: 5c72c44c76ab57aa9b7a95ea9f42c53c8d8c0f6c8c729a1c6cf2581be70770dd

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