Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63521390224a299…

MALICIOUS

PDF

78.3 KB Created: 2021-05-16 02:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8e4b9c58bcd859283d07ab5153e0e26e SHA-1: 2923000348b766273c626d1948aaf61f709253b3 SHA-256: b63521390224a29936da036b7de6b4c58f46365aad2fc813007da9cf6ae230c7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to 'Girl with the dragon tattoo movie cast 2009' and application metadata, likely serving as a lure to disguise the malicious intent of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=girl+with+the+dragon+tattoo+movie+cast+2009 PDF link annotation
    • https://wunabigoji.weebly.com/uploads/1/3/4/8/134891590/868006a0185.pdfIn PDF document text
    • http://dokeximikeveved.iblogger.org/scientific_method_printable_worksheet.pdfIn PDF document text
    • http://reabook.online/xumemoguxizetakofixrnfd.pdfIn PDF document text
    • https://febefadu.weebly.com/uploads/1/3/1/4/131453100/gegekorulo.pdfIn PDF document text
    • http://rezexepenoma.scienceontheweb.net/didnt_artyom_die_in_metro_last_light.pdfIn PDF document text
    • http://roguvopupo.22web.org/antibiotic_resistance_cdc.pdfIn PDF document text
    • http://vashobereg.com/sakeguwetaragegajebenj25k3.pdfIn PDF document text
    • http://jebonefawudo.sportsontheweb.net/convert_file_to_ms_word_for_free.pdfIn PDF document text
    • https://kofemadaki.weebly.com/uploads/1/3/4/6/134675418/diwada-golugutuwem-kesiwisurupis.pdfIn PDF document text
    • https://fejoburu.weebly.com/uploads/1/3/0/8/130813906/zutalugawepofib.pdfIn PDF document text
    • https://katifakemu.weebly.com/uploads/1/3/1/3/131381151/a004a5c7.pdfIn PDF document text
    • http://walapapu.iblogger.org/kivowajovikimulivixikata.pdfIn PDF document text
    • http://trydouche.xyz/ib_chemistry_textbook_2015l69ph.pdfIn PDF document text
    • http://kubosikavudux.mygamesonline.org/65675117121.pdfIn PDF document text
    • https://bomaripuxizidul.weebly.com/uploads/1/3/4/9/134901287/juzarokuwanorapezuke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifojuluguzix.epizy.com/sezati.pdfIn PDF document text
    • http://wororezijetixa.atwebpages.com/16787406347.pdfIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_6ee3b8c7598d4004953c966c4cee752a.pdf?index=trueIn PDF document text
    • https://e3c65705-3664-417e-97b1-2ac29bfab8bd.filesusr.com/ugd/6a5da5_f2bc78f5edf5411197393b93ebfe3f2d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBF 5968 bytes
SHA-256: ff2bbb285bbad053c92e2449295d506f7653e962a705a93ca41690f4f3345ff2
font_01_sfnt_off000100f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F4 12440 bytes
SHA-256: dbb8dace876c4a4f4d5ebad8de9b79565104f8574d6bb656e6c42430b19c4f34

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