Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5536966ca3746b…

MALICIOUS

PDF

79.7 KB Created: 2021-09-19 08:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e440e5b7889c964edeec26eb64707924 SHA-1: b6e07d69b05b54fb144fc121dfbf5537d0091742 SHA-256: 1f5536966ca3746b7c4a8c0198fd0a4681a47e8e5e54e0324373c1e3b158653f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a malicious PDF containing embedded JavaScript, which is a common technique for executing malicious code within documents. It also features numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://philabc.ru/uplcv?utm_term=waterfall+live+wallpaper+for+pc+windows+7 PDF link annotation
    • http://www.jobsincrete.gr/images/_user_na/file/96571551936.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-18/20210918060829775364.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/zatirulofig.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/81551147455.pdfIn PDF document text
    • http://kesifveotesi.com/files/31244282940.pdfIn PDF document text
    • https://izometal.net/mm/file/joxemavamapelijufijopo.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/8771458355.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/30639585676.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/rikebaxevapalasanatamile.pdfIn PDF document text
    • http://vpsystem.com/files/fck/razorurewojabujaluladagux.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/48104203464.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/93666583581.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/bizumugomogelid.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/33243830745.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/xamisanividijulu.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/21090176161.pdfIn PDF document text
    • http://metallpress.info/files/dagojolub.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/vumutesitukezalegir.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/32167774818.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/80514992387.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/zalapikogofixigolitofig.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/b8b7c32256225d3f587a47a95d1d2fa6.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/cd40d1f02973324899c4d16640e1b8a5/85425353339.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 10808 bytes
SHA-256: 72ab0f1aa3ca0216baf42097834f186f1d1544c534aec2b02dc103e9552a19ce
font_02_sfnt_off0001038d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 17972 bytes
SHA-256: e2db9a1723c346f5f78b072e4bb9f012469516dac77327367d8e04c3c5518fe8

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