Malicious PDF — malware analysis report

Static analysis result for SHA-256 1218ab23bad1c2a8…

MALICIOUS

PDF

73.1 KB Created: 2021-09-30 18:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0054c6716de9d24de88652268e87af5b SHA-1: 9e6dbc131b63d9b228a15c5cccfb967f289d56a5 SHA-256: 1218ab23bad1c2a80e48db573cda9920bec207ace47edcf3fb7d73c50b919503
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further supports its role as a distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://synerhu.ru/uplcv?utm_term=openstreetmap+navigation+android PDF link annotation
    • http://asvpp.fr/pdf/68091902624.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16149f32dc1202---20732702330.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/mibukotujixozifowil.pdfIn PDF document text
    • https://kudusde.org/resimler/files/nalukovuvikuxiboz.pdfIn PDF document text
    • http://didopack.com/files/wudoguvesom.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/89920184104.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/gebivopeledusosakabonuni.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/96bdbfc0f811dbdbc3147b81c82e6b69.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613681a350b0a---64152325896.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/59307047302.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/35604957671.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/vupowe.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/76957512936.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/44899034750.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16148b4f184338---42428782371.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/3244832841.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/dubenefogatesamofatepugi.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161406200c002a---26877643910.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/15959946728.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/15831505154.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/27361591018.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/79628543250.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613e98366df2a---78933084150.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/boxogegokulumidipemux.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_off0000b68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB68E 10780 bytes
SHA-256: 5eeaac3207dd3a2ed7a3b226ffb8047e90ddc2012920f40c7703d11f247cf462
font_01_sfnt_off0000cf39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF39 18088 bytes
SHA-256: aa559cfbfb7dc445702eba42a43c40ccc1982a3a606932469bf2e215c1d43e33
font_02_sfnt_off0000fe6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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