Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e15315e7f5333b5…

MALICIOUS

PDF

127.8 KB Created: 2021-05-10 08:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d9251a92f9d242f81a64427168fe3a47 SHA-1: 6762d78e8c2ae98f3040eac4f286bfae6b1f3ebb SHA-256: 0e15315e7f5333b58d45881eb6bfc11fa60dd7f97215022da2ba7490b39c78b1
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5239

Heuristics 6

  • 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.
  • 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 https://accesoriosalmayor.com/images/userfiles/file/83798807825.pdf In PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/3463a01e3b3d52e2c3f9b4926d3b0f86/seworopo.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/dalodirapevi.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/u8tk7f20n2q3e833afn2a00eu2/97920671757.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/6db6cd25aad6ebe50755da619f59c5ae/nosimenive.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f7ad93e71---puzilejapujakubumuxip.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/d9eca5382f4378328f2b7f00269e6a5d/pataduginujijunoguwifivak.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f2a5699ca---liruzorakufojogunox.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608540f64d9d6---sekuwula.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/af9cd3d3026a783c5592a590c402f9b2/74503528673.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cfb41c02a---14465438997.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/95167403704.pdfIn PDF document text
    • http://splogservice.ru/content/file/jatifota.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd433af7eb---99105619495.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d4472aa3f03e2476205ab10bd6afd888/27536556996.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//gokoloj.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608461037d326---34305243371.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/96f40246052057d9394745e1f4fa1109/77827369060.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/14ec35fa90f39e812c2a8b140a8fee34/divomewutatowasuvubi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=clz+games+crack+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001da88.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1DA88 20644 bytes
SHA-256: f70f005c1933d2a6f17f64f905d8c00f8d5b55489ac8f370965bf971d73f298e
font_00_sfnt_off000171a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171A4 9956 bytes
SHA-256: ba33c0a9478a4316de86e97912c7f8080a09a74b8704b039d8924be643aaaafe
font_01_sfnt_off000190f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190F4 5272 bytes
SHA-256: 2b87b0f28bfa1b3274b2428426807f7fbe29d86a5c5ea67f8cca4a86420cce65
font_02_sfnt_off0001a2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2CD 2684 bytes
SHA-256: 8d6f71cad75ac36242315fc5653c50f598a1035a7a33e4e40ed3c3db47ef7427
font_03_sfnt_off0001ad45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD45 15092 bytes
SHA-256: 401f23957f6514db440e35728173353610ce2406039afd22336ed94011746535

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