Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d0d1eaea0de885…

MALICIOUS

PDF

86.3 KB Created: 2021-08-11 19:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 002f76f4c3256b4fe2fc6717cc85f33f SHA-1: 7bf28235600f9390c6266669f3845f709eac034b SHA-256: 94d0d1eaea0de885b8f5feac4234d8660ebcb1afbb879db6159fbca835dc2e5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of 'utm_term' parameters in some URLs suggests an attempt at tracking user engagement with the phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://oniceh.ru/uplcv?utm_term=sony+vegas+pro+15+crack+patch PDF link annotation
    • https://xn--80aaijzh9b.xn--90ae/documents/file/jonapiwojubugi.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac9735437---7706139509.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/24363894223.pdfIn PDF document text
    • http://bociany.sk/media/file/78659687696.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fffa2ba11---16853159670.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6340206307---gufezesutisitet.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210703160308.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021080501343697794.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/webuwitarenajaxuliponufo.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/wadotuv.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/zeranufusiwigoxelum.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/9e6dd06c6898f2226457b433bd290500/fefutivukixog.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/7g7t97oni4tdlhdoa1huff2l10/buzopuwapuwem.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/r8f2sm8ramfeidrn54ob26kl9r/lofitemopiki.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/xuxomilefujaluner.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608270565323b---rutiwetuj.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/2d8daa083fa969914273b0632301480d/muwuke.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/34381891245.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/zufabazigubapuzizano.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/71356900028.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/s4p701s5jsfs73veee9dvgiea5/bapujabab.pdfIn PDF document text
    • http://fittbike.hu/files/file/31358812478.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/69665240885.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_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 17620 bytes
SHA-256: f63d15bd288e50c014ade9cdb88f004829d6fc7717c4f7714a84a457c85dc005
font_02_sfnt_off000130ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EE 11048 bytes
SHA-256: 9297241ccfbac693f81189bd3f2c38c7bf3818b95e315a8299f8bd6b8313bedb

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