Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a71a679f6849a8…

MALICIOUS

PDF

92.2 KB Created: 2021-06-27 22:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: bc676827401744e0b28636e6aba7fc7c SHA-1: 6a09dda2ce0b8b5fecec2fd4a654e46f3046ee09 SHA-256: d6a71a679f6849a8e3e58c1b7f649b5d6d4d1d08db2ba60f257b1281b33a0104
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and points to compromised WordPress upload storage, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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://medvor.ru/uplcv?utm_term=fecal+impaction+at+home PDF link annotation
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/8djd2s18j7e513bedaq50kksaf/radofozuladebopepemovijob.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/24003971488.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/gakopasi.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/08bcaa0777ebf74c729581c229401890/darejukinotoxizus.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/5378424158ee5de6cc1913d8900ee245/juvumogenikob.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160967d50d3f1c---67426516234.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/8ba620e68323b7287a3eb66dffd9b682/tatagenojukufewaxurenejef.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/sowiroso.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8947b69c8---zadekudiluzinemivuzo.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/727fe7fa41291d1af232108809256d83/64460516479.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e38247a7ff---roxisisegipiv.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608895880c2d6---9890864335.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/4ff46687622a75105a8a18e26ff0277b/dapafa.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/b8523bdd294f1ddf28f7c7389cf19917/10125758943.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd8d552d9c---wewefamasiwupep.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/h8nqagc1b5oj7lgft2sugf4m0v/mologiluvuk.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/kcq236m99vlqkc2u64008uaqa7/57644683083.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/93729083697.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/fesunufezeti.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c45ad0a0e8---varolawatiwadawukixatabit.pdfIn PDF document text
    • http://htwy.com/upload/file/26531449101.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b23a6776a459d5cab7f6f0c43073bc1b/73850357139.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/48398849719.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001094d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094D 16744 bytes
SHA-256: 695e90e6af1d817ac6a618e74898e3565624ca7595a4e534b1c08927e9cd8863
font_01_sfnt_off000134a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A5 10348 bytes
SHA-256: 5afcc7dab0f5b4fdc9e9a63641492f6bbefb7081b6aa5c588c5419e168831494
font_02_sfnt_off00014bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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