Malicious PDF — malware analysis report

Static analysis result for SHA-256 223f53e7e0ed3afb…

MALICIOUS

PDF

84.0 KB Created: 2021-03-18 07:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 568679dcf93299e1f9606c6b8ef2ccd3 SHA-1: 5a51c83af6bc3f6212e3e9d4558a9f1311b34ab1 SHA-256: 223f53e7e0ed3afbf8997101e0d4e119ba0860c42f2b5d40d0cc73c085bffb94
156 Risk Score

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 0.9990

Heuristics 5

  • 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.
  • 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://dafemum.ru/award?keyword=salivary+gland+tumors+pdf PDF link annotation
    • http://zufudaduj.iblogger.org/sejusebubimonowipemife.pdfIn PDF document text
    • http://unosital.space/jigevokowogigajotanumerwvj85.pdfIn PDF document text
    • http://perevod24-card2card.site/jaduzulibasarsxrra.pdfIn PDF document text
    • http://storezone.info/mokoluzim12i0y.pdfIn PDF document text
    • http://mangalvpodarok.ru/xamarin_forms_android_navigation_bar_height4y2tn.pdfIn PDF document text
    • http://servempieza.site/sparknotes_macbeth_act_4_scene_1_translationf726j.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/the_collector_lol_brokenpb7xz.pdfIn PDF document text
    • http://lngcliente.com/mafawupojotiva6serj.pdfIn PDF document text
    • http://jaxakevog.22web.org/integral_calculus_book.pdfIn PDF document text
    • http://inglassrus.ru/9517431458966uxs.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/fapaga/how_to_win_arguments_william_rusher.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/wipoveropabisadin.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/nafaxepogujut.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/80215408054.pdfIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_025d40fd438b4334aaeb2c4998f91505.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/4890566937.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/clauses_exercises_with_answers_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/smash_bros_ultimate_galeem_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/72787756846.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/46097054364.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_538c5ab0f13a40febdd59b458c3b130a.pdf?index=trueIn PDF document text
    • http://ganenimipoje.epizy.com/desenumalanixizedika.pdfIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_fe7bfbef50534a5391ab8006d81ea96a.pdf?index=trueIn PDF document text
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_4d0addf5906148f7ae041e04c9144c13.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEA 5388 bytes
SHA-256: 3aae4109a16d1f764c51bf5c86bb9717e2e5e6b14ab4bde5e365102a0736d6e6
font_01_sfnt_off00010e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E24 11276 bytes
SHA-256: c89daa8e59154895a339e49d08f1360dca8adda482a3d51d4b54e8b70979f062
font_02_sfnt_off00013465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13465 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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