Malicious PDF — malware analysis report

Static analysis result for SHA-256 2199e19da345c0b8…

MALICIOUS

PDF

93.4 KB Created: 2021-08-08 01:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e1b73ff6e7497159a955ca3ffc2f7d91 SHA-1: 4f6005821b9663ebb1451e8ec1321fbfef04105e SHA-256: 2199e19da345c0b8ad155abc2678dbca572ad8132b84dc954e9b38f116b6721f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://parvazyab.net/basefile/api203/files/fekekojufajudebifali.pdf In PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/k1cf3cjm63t12sr5aj5rlnkpvp/39355964324.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/me12n988dij6r6p4glpi89p64j/kodubagomotamizesonuguko.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/xuvoniwe.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1dce79796---wisifopubufefakigosik.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/rilimigaralipap.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160900f1d6b229---68415037971.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/f62a263157cc334238c4a53fbd74077d/56158084181.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b927c4a028---88922154733.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610bcaa872082---93464675461.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfdc952cb3---mapilowakudikoxizewimaji.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/judilesuvezop.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098310b6c26f---pinexabetafafomejuk.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9894b62669---9800256432.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/talopokevasibamaxome.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021072111370117.pdfIn PDF document text
    • http://ddgasul.com/userfiles/file/95338747665.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/kukuzotiwizomof.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/gurenor.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/fenuvamit.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e1cd02df052---notofalovofebadoxena.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/63f4d2f2fec312f944ae42c214def273/3140005106.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/94427537570.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d7315d5f6---notopakugilutekasefe.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/9hkv07el1v79ftreesrbc1em72/sunomepujoxobekureven.pdfIn PDF document text
    • http://vce34.ru/attachments/file/67391644626.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+day+trade+for+a+living+andrew+aziz+reviewPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBE 10680 bytes
SHA-256: ad81da2214856db4e92e56738aaa811779c9b4d2ece1389b7658eff621ea278c
font_01_sfnt_off00012425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12425 16668 bytes
SHA-256: 01f24b516ce01ba0fbb1884ce92881a73f26a8513f45945709c96d98c1c2f753
font_02_sfnt_off00014f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1