Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32b17387fe227a1…

MALICIOUS

PDF

70.2 KB Created: 2021-09-17 14:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 81d30cae6b64fae4568f083332795278 SHA-1: 38ed1fbf16f9532523cd1d8accfe99ca2b43cede SHA-256: c32b17387fe227a154a07a259e1dad8bcdd365faaec12b7c11f2a9a943ee7515
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. This script likely redirects the user to a URL hosted on a compromised WordPress site, as indicated by the PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic. The presence of a raw IP address in a URI also suggests malicious intent. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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 https://samavetpharm.com/userfiles/files/89896240595.pdf In PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/luwirenorupide.pdfIn PDF document text
    • http://envigest.cz/upload/file/65770276832.pdfIn PDF document text
    • http://gewidor-gmbh.de/uploads/files/vopikeverofakad.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/81175359737.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/53269290003.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6a4996ec8---zajufokeze.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7306564f2---xurabo.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e39f757227---guguj.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/zifomesopuliwimenefisu.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/45905996445.pdfIn PDF document text
    • http://budropol.de/Upload/file/60509664585.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137896ea372d---lunesixepunetosarixi.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/tivobikowapaligifog.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161325d8b18c7e---zivozex.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/bemijerod.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/volasefapukazupezojukupe.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/oom0gfde88tib9jumba9lbkbl0/guranagewamikufeponikaba.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/36436065968.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58005753870.pdfIn PDF document text
    • http://boldogelet.hu/media/42534798888.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/kuxadimiboz.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304903e45f3---55652112484.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/rurojikun.pdfPDF link annotation
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=lego+star+wars+tfa+unlocked+apkPDF 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_off0000b28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB28A 10936 bytes
SHA-256: 2d3304125b64df561e4c37eb2c57308dac78c1fefc6c87c6dae6fb0136930110
font_01_sfnt_off0000cbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF0 15320 bytes
SHA-256: 247b7eed46a764bf9b9c3a1081ee6726bfbc8621b76f820c8f0f68348a9fdd35
font_02_sfnt_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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