Malicious PDF — malware analysis report

Static analysis result for SHA-256 059c7ad03ba5ba29…

MALICIOUS

PDF

82.9 KB Created: 2021-09-09 07:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 33a2a6207c66a6a4f5b22e9faac5e444 SHA-1: 9edc69224089b16ce0a3479b4a86e4900f509b46 SHA-256: 059c7ad03ba5ba29727bf6eb33c27ec22be5c7459a111e71cf93685e516f946a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9846

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://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354a7d74388---30009558415.pdf In PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161395f5b75852---14319977668.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/vipoveti.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/34062521280.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210909073828_6496241.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/89247473668.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/wokaluvowajep.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/29645738254.pdfIn PDF document text
    • http://beiwendq.com/data/attachment/file/55955267026.pdfIn PDF document text
    • http://riasztoszolnok.hu/admin/fck_upload/file/lumejerajeduxirovobut.pdfIn PDF document text
    • http://nhac.ditimchanly.org/Images_upload/files/rovonimaxomuxawo.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/zemotubuxibejiwajakupa.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/85972372327.pdfIn PDF document text
    • http://fusiongrup.ro/userfiles/file/9433509034.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/77024332827.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/87028328124.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/26519385432.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/mejatuvuxavudoviganaru.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/42760273224.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/mupuxeviv.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/66744026833.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210908052851.pdfIn PDF document text
    • http://jafra-com.at/userfiles/file/pufexarowimiwigodo.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/19935158541.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/puliwobevudurisivaxa.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/90356414159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=itunes+music+download+freePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB7 10776 bytes
SHA-256: 27905e39171bb41a16b85de4911d4c2eb48a352cea2e2a3f67021dc32a82f5df
font_01_sfnt_off0000f890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF890 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A2 17572 bytes
SHA-256: 7ae7d98e4644091adbc9e5e50b3074938e358b84bffc3956c1cb7b9796fa476b