Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc69198311dac07…

MALICIOUS

PDF

84.7 KB Created: 2021-07-14 03:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 79d492965a87a254346be081b6641e68 SHA-1: ede21cc4ddad99cca675d54b9859c4a9f8494cfa SHA-256: 0cc69198311dac07214652a4b8dce3bc9cb4be7ef1ec7516b28e0e64e736b127
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, forming a link farm likely intended to redirect users to malicious sites. The PDF itself does not contain readable content, suggesting its primary purpose is to host these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://bmw-zona.ru/uploads/file/29097429246.pdf In PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/e42afd010abd581da39fde1f6dcb9f14/39698360797.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/81786628454.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085242bc3bdf---53767184801.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/potokagotowigagagavo.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c238c02e039---jikilajafovasem.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/osl8rcfvjsshvpt9mss9vjngus/51456135686.pdfIn PDF document text
    • http://expresskaliski.info/file/ronapoki.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/nuluvosegereto.pdfIn PDF document text
    • http://thephinhmienbac.com/upload/files/91758355471.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/9ecf0188812cc7835e412de650a31735/ruxezatumegebuzu.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/xijumigeriseraluxofaja.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608d071b443c2---jegiju.pdfIn PDF document text
    • https://topplene.com/upload/ckfinder_temp/files/20210703015346.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/fimanopokalibaf.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/porupuwu.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/gexesuxoloxewibogo.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b3627d25d6c---4233479487.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/64ac902b3b71422f263880a347d7db76/96966004580.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/80151238635.pdfIn PDF document text
    • https://stopserv.ru/files/file/rexuwob.pdfIn PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/384862989db57939448c4bde452897c2/82207628181.pdfIn PDF document text
    • http://slsnn.ru/content/files/wepamemepaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=regular+verbs+list+with+meaning+pdfPDF 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_off0000e858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE858 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001006a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 16652 bytes
SHA-256: 8f434ca7b0c908327d6c22c0ae2f1878aec692e267ba2c3a4c86248370179dcb
font_02_sfnt_off00012b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6D 11260 bytes
SHA-256: d6bf76ff4bf188aa24c33654bd1502c6d5067d5345f635488e6bfe27a673b3de

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