Malicious PDF — malware analysis report

Static analysis result for SHA-256 7689c13d2f9f3aaa…

MALICIOUS

PDF

99.7 KB Created: 2021-07-07 18:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0ca38a8762300955cf7749d9d091204c SHA-1: 991ee945be1c2e5666a285e76a2aa2cde125cbbf SHA-256: 7689c13d2f9f3aaad5f5e0c1bda9d2a194f602406e1efdd2ea42d06170dc5d34
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and IP literal links further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://laborke.ru/uplcv?utm_term=vivah+full+movie+with+english+subtitles PDF link annotation
    • http://arnold-sitter.com/CKEdit/upload/files/mofupawasajadavuke.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/17p2tvmojm5tqftvgeh1kq0854/mixalejanowevoxabi.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076a27153f82---94694435126.pdfIn PDF document text
    • https://okna-stv.ru/userfiles/files/xopapik.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/54361582695.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/32779932284.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/vi6lnaumomecodh2l0a7u85381/sulume.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609857d40ede2---fikida.pdfPDF link annotation
    • http://haiphongcontest.com/images/files/defogeleti.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c723c5dac2---23248318732.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/d528a03026f790bf01c6db5c5294c8c2/bavubewobawe.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba6aa8cb96---79533149687.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/pinide.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5adbeb3ea---wofix.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/6e5e95f6699efbb000748715ced51c8e/jonomefexuxotetoxuziw.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/18671853065.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/5bbc15377c07b1f17d9ab9a67103205a/24221903713.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/2dc6f7db93807423173704a5a8abc6b8/21932326900.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/ligefap.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/10478396713.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/83893900082.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160999bb15edb3---94005358402.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001004b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004B 10920 bytes
SHA-256: ceb5645746e61df369d431c02240690575a0e85fba7a25c41e3224d3a9fc03e0
font_01_sfnt_off00011981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11981 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13193 19068 bytes
SHA-256: d90bc593a19cbaba2469848fd75c5ae20c18056697c2717b26eba9e2ed733c91
font_03_sfnt_off00016468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16468 18140 bytes
SHA-256: db7f9d6fe706f5862291076155b5ddcd4094c7199a983c9aebe27035fd8e7857

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