Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ca025e414260cf…

MALICIOUS

PDF

86.7 KB Created: 2021-09-07 22:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c58556d75a84c7f86f86b7815687bdfe SHA-1: d64a89fb7be409ba921c92964eefa921006e3241 SHA-256: 96ca025e414260cf976875d4b05b81c434263207d46f21aedee11e949245087c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The presence of an embedded JavaScript stream further suggests the potential for executing malicious code. ClamAV detection as 'Pdf.Phishing.Trojan' reinforces the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://nomylo.ru/uplcv?utm_term=large+list+of+english+idioms+from+a+to+z+pdf PDF link annotation
    • https://palcev.ru/userfiles/file/71814346656.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/jvosmgi8blgqm8badvnu7osbph/peneno.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/niledodevit.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/28261297065.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/89340939972.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/939ff500c9f882a168869c34fb49c42d/70316717757.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/maguzivikibigoz.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/bogamuru.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/0f84b99cc234f3da8d2d4e4a5ae6ef8c/59370368242.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/80503319665.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/falazajutonixi.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/serijovorutibop.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/75019325585.pdfIn PDF document text
    • http://stevis.cz/files/file/74882265578.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/musaxefafow.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161273bf89e761---dagaze.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/d9ae2f1e63007990a0ddd33b269d3684/perajebavelunesi.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/g4278n2vpkurk3pdt9vc7p1f73/58021661291.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/8174b2d6dfe738db75f86c0b6e369d91/35570067906.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/2392489067.pdfIn PDF document text
    • https://kawanmto.net/contents//files/7806617349.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/j0ciu47d85fib796jsnrovcfrn/92807774885.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/c071a1572767e68b2d83d649286fe7d2/9497686513.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/9029219747.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC60 18520 bytes
SHA-256: 93710cbd2fb4651bc542c0ff04a4caba5378be38465acf96faaef637dd1db25e
font_01_sfnt_off00011b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B49 10960 bytes
SHA-256: d90d69f460296ef5403fe633860eaf443b70fa3cbecd4f5fec6ccf2e293ab7d3
font_02_sfnt_off00013449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13449 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1