Malicious PDF — malware analysis report

Static analysis result for SHA-256 46739afcd1d1ae1b…

MALICIOUS

PDF

83.2 KB Created: 2021-03-23 22:14:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: db56fab417d0e0d91f45db1dd026b46b SHA-1: eb7ad5a7c02cc0a183650fe7b3c757290777159d SHA-256: 46739afcd1d1ae1bee67a89e6de82ee3f397611a15bbbff4f38f85c86ae5be22
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with a primary suspicious URL being https://xezojetit.ru/123?utm_term=sheet+piano+endless+love, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains references to 'sheet piano endless love' and 'wkhtmltopdf', reinforcing the lure. No scripts were extracted, but the PDF structure and external links are indicative of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/123?utm_term=sheet+piano+endless+love PDF link annotation
    • https://cdn.sqhk.co/kukisigafumi/W0SB8hd/xibawademazirazobi.pdfIn PDF document text
    • http://pikaromabunoteb.iblogger.org/36388327716.pdfIn PDF document text
    • https://cdn.sqhk.co/vajirasavuz/Viagghi/shellac_nails_done_at_home_kit_amazon.pdfIn PDF document text
    • http://dosemamorozaj.22web.org/paleo_diet_plan.pdfIn PDF document text
    • http://kegetisa.mygamesonline.org/angiofibroma_nasofaringeo.pdfIn PDF document text
    • http://jumufedug.22web.org/fidoju.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
    • http://kepikinol.epizy.com/remopakepar.pdfIn PDF document text
    • http://vurosija.epizy.com/jeff_buckley_hallelujah_guitar.pdfIn PDF document text
    • http://kejufunekopal.epizy.com/56654298993.pdfIn PDF document text
    • http://xepadofesopi.epizy.com/chapter_2_summary_of_the_watsons_go_to_birmingham-1963.pdfIn PDF document text
    • http://vosolapigufax.epizy.com/dadarigibu.pdfIn PDF document text
    • http://lugavatakavupo.rf.gd/baidu_search_engine_english.pdfIn PDF document text
    • http://gupezifiromok.epizy.com/all_name_reactions_in_organic_chemistry_class_12.pdfIn PDF document text
    • http://roluvad.epizy.com/98230357668.pdfIn PDF document text
    • http://legolipif.epizy.com/19580281258.pdfIn PDF document text
    • http://woxedizoxe.rf.gd/89177998190.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/paperbag_princess_melrose.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/lekutezedivola.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE289 6796 bytes
SHA-256: d7e2815ea76b7073515300eccb6c5934e207a828c1b69a752ba1000b2d482c9f
font_01_sfnt_off0000f943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF943 4900 bytes
SHA-256: 88e01ea0f65a7de04d76f4ccf0fe0c98fbaa1789ef6aca6ef3aa1e0f3668898c
font_02_sfnt_off000109e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E2 11980 bytes
SHA-256: f8ad5a2edb9041cc3ca6861eb6c2e2e4add4522f365bc5a92bc39aa281633d19
font_03_sfnt_off0001325e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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