Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a450dd83ee6ad56…

MALICIOUS

PDF

111.9 KB Created: 2021-07-27 21:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f2f0d6e85101e9eb7c4d86c0e86a8392 SHA-1: a77aecea44445621c3a4cc0c8d1a134495755a1f SHA-256: 0a450dd83ee6ad5644e7cf1b3f2fc224792d2cc482846bfc33a38e38dc79e4a5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or social engineering lure. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links, some with UTM parameters, indicate an attempt to redirect users to malicious content, likely a phishing page or a further payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160916909b0a53---tetiza.pdf In PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16099840933210---xifusamepekoluv.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c8ad018ea---woweremalejakop.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/m6de5800mao35ohi1kcom37e04/bivada.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/43361023371.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/55426803584.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5393323233---kikanikuvulipugowim.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/gavevarav.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/66dfd7e9092617e7f7a3ac1a7a18f10b/39425348210.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///jubif.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/91ce884f43d8b7deedac34a55ad48241/mekevolatavoje.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/35asfk5g9ia7hkgpg138oe0407/46600836156.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719c4ce7802---48007039757.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/dukutunewu.pdfIn PDF document text
    • http://anpo.vn/upload/files/towamuzevuliruzami.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160700a910f2e4---rimude.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/20520103170.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/76411920591.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/wevozifitanakonopavigi.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/77626916686.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/bagetemovak.pdfIn PDF document text
    • http://wardwrightself.com/clients/863644/File/buwimenumogodoxama.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/xaweliba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=make+fake+blood+cancer+report+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A4 10668 bytes
SHA-256: 37b283fd68dfa4ff168a3d4bc6c436cb01f77b209669e550f3443395f90574e9
font_01_sfnt_off000150f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150F4 18580 bytes
SHA-256: 8a9ee08c45c920d4dc8dd689a978c148d1ca5f529be7d5293133a34341d01f18
font_02_sfnt_off0001828a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1828A 16232 bytes
SHA-256: e06ebeaa2bb94d9bf14337b0794fec2c9c4a66e30291689b6f6234bfe360c8a5
font_03_sfnt_off0001986d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1986D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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