Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afb97a7c54fd092…

MALICIOUS

PDF

78.4 KB Created: 2021-09-11 23:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: fd55722f70a702be8aba5381d6982429 SHA-1: dea775c6946c9110c6f3ef9856ff5f9838aa581f SHA-256: 5afb97a7c54fd092d46c8d36cac398671ff98ce81c1c238bfd0f16a10d421b85
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://alhouti.com/userfiles/file/24436425008.pdf In PDF document text
    • http://www.rupankar.com/fckimages/file/gevemofu.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/97278153860.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/xezolokefimox.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/fugotakobotur.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/jegaxejul.pdfIn PDF document text
    • https://negaratoto.com/contents/files/nekasoponowawexuto.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/4719259063.pdfIn PDF document text
    • https://frisch.ro/files/file/17812119130.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/61293839444.pdfIn PDF document text
    • https://timminsrenovations.ca/file/hFdazc2TTqPo6P1q.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/wibizovitapazuwelikakevi.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/69713121147.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fababc641d03318466e4562b493385fe/jumimiritugufobiwur.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/xanazepelatigaj.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/terevezubapapuje.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/22818856018.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/78666418378.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/xoxakofudoluwojebukeku.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/6852936673.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/39674906593.pdfIn PDF document text
    • https://ebooksweb.net/files/file/votadumoxalegolu.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/7763874365.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613141ad5f27d---xidupawoseguropuj.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/tavamiwovabaz.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/jerufitebeligagominavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=gangstar+vegas+apk+mod+android+1PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB651 17440 bytes
SHA-256: 2895981a83dd4a89653c6a5ee2a7d0a781e7d700b4c1d8beddeab0f9bbf7da1a
font_01_sfnt_off0000e2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AF 16500 bytes
SHA-256: e86af23e0b02045a9bc281dba257d31e97eb2d5c8ee0f31a5ae3ba5f60c43586
font_02_sfnt_off0000f9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000111e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E4 10940 bytes
SHA-256: 80322b1318609f403a5ee63a779a44ce6677b97783f042f4f95a578ceb914fa4