Malicious PDF — malware analysis report

Static analysis result for SHA-256 1454ee4f05a02fba…

MALICIOUS

PDF

80.9 KB Created: 2021-09-09 15:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e83ffe0de76ff7980ea1a4117a0443a0 SHA-1: 799fbd2706ddb8ecb280d047d17d5d83122afd6f SHA-256: 1454ee4f05a02fba06873a42b5ab25eeb4eaf00f4592f51a92e4e5db24a5051c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. This suggests a phishing or malware distribution campaign, where users are lured to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://storemisr.com/uploads/files/pekuwisum.pdf In PDF document text
    • https://ofcourselc.com/admin/uploadsfile/26195351289.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/16124488648.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/xirufaduruladokalef.pdfIn PDF document text
    • http://polipack.ru/content/file/69846135985.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/d9l5cja58unsriq1eoalpvc35e/55765097771.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/roxelalolagidewejivuz.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210907030033.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/93041459059.pdfIn PDF document text
    • http://www.painters-restaurant.com/userfiles/file/69783758629.pdfIn PDF document text
    • http://csigikes.hu/admin/fck_upload/file/xizewobokasuvemiwujuxe.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/javavefukubozenedep.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/a2362642cbd6917e3dd3c79af1f35415/20589419061.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/18115529105.pdfIn PDF document text
    • http://wych123.com/upload/files/ragido.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/27876269598.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161347de64b491---mogugesolaluxala.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/sirijelifasadovuvixupi.pdfIn PDF document text
    • http://gemcom.org/userfiles/file/75429338812.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/29851944486.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/jorume.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/vojulixuvilaxexifiroris.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/lakenajepe.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/p83ojn7tv3970cphq5qprh2uuu/fuzokiwujop.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/85291883848.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/420e179964da3d9f264e3826fd3d7cbe/kedamidasajuzatibufegeteb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=mugen+train+english+sub+onlinePDF 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_off0000d860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD860 17472 bytes
SHA-256: 559f144f2475dfcea57941dd439aa9de8a43b62ecc2922039548e444d2abcf3c
font_01_sfnt_off000105af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AF 10620 bytes
SHA-256: 226422b0e63feb4fcf8eed5a36cdf9b6408161018a13adc5a3525626b3d5a813
font_02_sfnt_off00011de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1