Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d397e12c57ab16…

MALICIOUS

PDF

79.5 KB Created: 2021-09-13 23:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 18581d7f34d1a26a4970f09e98cf0fa1 SHA-1: eeadeb60e0c71eaa39026cb33afde6f9d933a9af SHA-256: a6d397e12c57ab16d195d6e34b4ba7845460e4efd99ab1c2a09146b0fe7378fa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to potentially disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's used to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/60110485466.pdf
    • https://phukienbep.net/media/files/gukovezoviwaxur.pdf
    • https://botroul.be/uploads/58388777281.pdf
    • http://oa30us.com/userfiles/file/sowivogukuxewozota.pdf
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/fitirusewet.pdf
    • http://www.taxivanclass.com/uploads/ckfinder/files/sugegas.pdf
    • https://comfort8889.com/upload/files/nanifeno.pdf
    • http://shinaval.ru/userfiles/file/74460137874.pdf
    • http://studiovalentini.eu/userfiles/files/falowikupugewevunajo.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/a1986098ddd801266dea988f7f81531f/lazoxojaremenu.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320075121c4---kelulitipado.pdf
    • https://xo-sound.ru/userfiles/file/jamuvixobixakafuleduv.pdf
    • http://tradotel-riviera.com/file/6860357285.pdf
    • https://kovtec.pl/eurostyl/photos/file/49644242584.pdf
    • https://nepalihemp.com/ckfinder/userfiles/files/3372632422.pdf
    • http://gzcaifeilai.com/ckfinder/userfiles/files/202109050609043156.pdf
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/77310421248.pdf
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/nefefun.pdf
    • https://www.passion-rnd.com/upfile/files/2021/09/05/16906961275.pdf
    • http://realestatespoznan.com/uploads/lemijewekumixixusuwelep.pdf
    • http://palmdale.thepokeluau.com/uploads/files/13456111623.pdf
    • http://abw10thstreetne.com/uploads/files/noduzedodabavasijabida.pdf
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/56548140647.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1613a771a49e63---38974214410.pdf
    • https://valstybestarnyba.com/upckfinder/files/6120418099.pdf
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/49290804038.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=farming+simulator+20+ios+cheats
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd2d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2D 16792 bytes
font_01_sfnt_off0000e544.bin
f4c2158f6f2ad67d797944842110be53f832c2b012c160fddd233ddb0b22e33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 10996 bytes
font_02_sfnt_off0000fea7.bin
515da788f2fc2301ee54b6696117c5e2f9f5e99424c3bbab0503837c984f54a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 18832 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.