Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6ab54a29d0e7df…

MALICIOUS

PDF

82.7 KB Created: 2021-10-11 01:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a16760fac1e73ba9eb7ef26026aaac20 SHA-1: e696233216ef10b42f0de4194c08a219c8b4c00a SHA-256: 1f6ab54a29d0e7dfa7e232d66d6df1c387e7fb817ff00f6a8a74c88176e650c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and points to compromised WordPress upload storage, suggesting it functions as a link farm to distribute malicious content. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://crewmak.ru/uplcv?utm_term=water+expo+2020 PDF link annotation
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137cbaac1c18---12034283996.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/28210563106.pdfIn PDF document text
    • http://thewesternmist.com/userfiles/file/tuvesinawakavinonujovajaz.pdfIn PDF document text
    • http://vladekoservis.ru/files/83609689791.pdfIn PDF document text
    • https://bonaparte.cappencms.com/templates/files/14447442930.pdfIn PDF document text
    • http://uzunlarpeynir.com/dursun/upload/files/rurazeko.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161408eda8e5bf---fitep.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/82322091313.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/kidakulaxa.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/paxopatujegigugorezawuxav.pdfIn PDF document text
    • https://studyhalltracker.com/files/file/29373805806.pdfIn PDF document text
    • http://supragyn.cz/userfiles/file/15033150678.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/ab5c0beba5c34ee718af4fb28286eb34/mutixopawisama.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/60156031137.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/laliwipomej.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/76785643283.pdfIn PDF document text
    • http://coytex.net/ckfinder/userfiles/files/69129767653.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/debotonorofisosoberemes.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613265331c249---28193018871.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/41252264622.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/vefutasovexunel.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/68478935350.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109080421342806.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/53415007365.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/rotuxipitakaxujosono.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_off0000dedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDF 10172 bytes
SHA-256: be7781ed7c12548c14d885eb47535931a94873a59b5bc7f8aa55c2e40bdb112d
font_01_sfnt_off0000f5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE4 18216 bytes
SHA-256: c6f31bd66ae64dabf708b83fbe57b2a941653ce5ae9f0c7d07a26118a69fa5ac

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