Malicious PDF — malware analysis report

Static analysis result for SHA-256 974c1c053b2df357…

MALICIOUS

PDF

81.0 KB Created: 2021-09-13 09:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: e217869efb6594affc7f3bfd919849a4 SHA-1: e63db0998c01d9faceccbdea9a0bfdd55e2a9c2c SHA-256: 974c1c053b2df357812b92373b5b348a19828b27f7a116558580d8ef6185ddee
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 0.9949

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://krisoc.ru/uplcv?utm_term=ibomma+telugu+movies+new+2021 PDF link annotation
    • https://kimcert.com/E/file/ribexidegasusonalilegekaf.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/xadebizunezogasup.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/kufasal.pdfIn PDF document text
    • https://domilot.com/uploader/files/51241781338.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/jekexerakokufivelovaxi.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/6844398887.pdfIn PDF document text
    • http://rts-3.ru/upload/files/51236416649.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/nuliliralafun.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/79952899162.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/35463588962.pdfIn PDF document text
    • http://syekp.gr/sites/default/files/file/80616455384.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/zukotavomegadediw.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/wipulidujur.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/72256775539.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/lewejazonakapogajirufabis.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/2501845212.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/jikigisewelal.pdfIn PDF document text
    • http://edituj.cz/res/file/46998165662.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/musekubajisunugajemuxigax.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/26474561448.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/jofejanegobu.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15628464354.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/52988503597.pdfIn PDF document text
    • http://cyuansheng.com/userfiles/file/jabemogek.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/rulopevukazikuwuri.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00D 17136 bytes
SHA-256: ecd19e55a8c46bafd0083add702b462d960abc1a4d7c9e2c10f9fd4e191f410b
font_02_sfnt_off00011c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9A 10988 bytes
SHA-256: 4da7811dcce4a0ef129f327b6d1d382cc1a5f4dfebeab73e950a0884667fd8b1

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