Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd62f8e47cf49dc0…

MALICIOUS

PDF

80.4 KB Created: 2021-05-31 17:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0af318c00c822f0c626b4b15bec3b7cd SHA-1: d84e6dc22cf9b252719325fa22eae8c5c4fa344d SHA-256: cd62f8e47cf49dc076da7a3ec5f3c7e85a5cb307ff5fc98da0b98631c66fac70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged 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 compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection scheme, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9839

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac143ab80ab---mevizuvugifaw.pdf In PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/c76525db252ee5becce291a99eeb4f05/nikozabixeta.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/55ca337caeffe3ab62459c6f92d42cec/61305177616.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/jbrn1quj02hkchdqouk0100i2i/16972446231.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/1626b4f2b47b5cf7d72775c499b852c9/wanafawowipogisenutoxomol.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a934c8bf38e---37759003195.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc8a01b8e2---17441020757.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d86c683ff---77413874138.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/rupetakuzixopabe.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/phnut829al9j6gbv6h6lgrgo31/98966382090.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef52d8d33f---80415468770.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/10585038cec0878057b9053a7024b2df/57274538654.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/skbop6vncrjcldg7ns65nmkl4u/sizagezed.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/d5608072926bd25c8d1a6512da6e0e51/basuzogukitigogawope.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7523f3e8c---89958433087.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/858d546046b20fd1c600b147135d9cb6/rezovozizidafobajimo.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096957be6b36---vemenipobuva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=best+drill+and+impact+driver+combo+2021PDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAC 5580 bytes
SHA-256: 8243aa369d6b4e9e653c0c5e89ac5f35b15fd9edf97120cd409fc0072852c3e1
font_01_sfnt_off0001027c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027C 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B09 12080 bytes
SHA-256: 2427f804f9b89a69fea5c083fcfd8caea707879b4e058c78fd10452b440c8511
font_03_sfnt_off00013298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13298 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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