Malicious PDF — malware analysis report

Static analysis result for SHA-256 e099b2db12909ccf…

MALICIOUS

PDF

89.1 KB Created: 2021-09-20 06:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 05e4d15e920fdad37131be0ff00ef1bd SHA-1: 184c82c6637f7ba424f1c6368a4a478845356713 SHA-256: e099b2db12909ccffa2c45198a2249036b7b983a6507f897d5b9548fbedd2eaf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The sample likely attempts to exploit PDF vulnerabilities or trick users into visiting malicious sites, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://airshow-bg.com/file/lipadikobarulilejujimuj.pdf In PDF document text
    • http://haiqi-machine.com/d/files/wipegaruxu.pdfIn PDF document text
    • http://dominant.name/userfiles/file/94330903873.pdfIn PDF document text
    • http://mosjob.ru/images/file/74198579040.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/26878346958.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/19894303357.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/tavotirobotudofovadus.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/536898e6ebe4456322af2c76cb067ac9/91442303737.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/42898995297.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/pufefigube.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/wewiku.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/kadom.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/99573556962.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/77789933228.pdfIn PDF document text
    • http://lblussana.it/images/file/41206681974.pdfIn PDF document text
    • http://lunaleo.pl/userfiles/file/tilalajawafefises.pdfIn PDF document text
    • http://chromoink.com/updates/file/bekakewokijepanozuvas.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/bapagobikosobamelejev.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/21329577900.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/230259d165eca392b7081e7cf88a490e/tilowojepa.pdfIn PDF document text
    • https://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/70036256567.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/75218313445.pdfIn PDF document text
    • http://eluvial.com/sites/all/sites/eluvial.com/files/natiliwowaxadotejopi.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/juvoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=yo+movies+online+watchPDF 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_off0000f9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DF 17596 bytes
SHA-256: 4d121c7d2fb919e08cce1eaf25a4b7b3420d63e84adfe42e836425b5a63637d6
font_02_sfnt_off00013f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F12 10532 bytes
SHA-256: 2e4a92b2d43caeee8657f818be212eab116b9758f01bff1ea3eb16f48d6e44c1

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