Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bd9d2089b4774a…

MALICIOUS

PDF

97.4 KB Created: 2021-09-06 04:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0f0c1a2d57e94ce6e4ac1bb01c02d176 SHA-1: 1cb0f7967d221ec089742404b9ab0a9b1a42eb5b SHA-256: e1bd9d2089b4774ab12d2cca089fb1458e50285aa1f95c3f7eec7c1585db43ce
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of many distinct hosts and the use of 'utm_term' parameters indicate a strategy to distribute traffic and potentially evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://drafthe.ru/uplcv?utm_term=weber+genesis+silver+b+parts+manual PDF link annotation
    • http://akvatoria.by/UserFiles/files/86205172745.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/14303158518.pdfIn PDF document text
    • http://chandravanshi.com/userfiles/file/56606955608.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ba4f3msqtclc13951c81bo4n95/13180086724.pdfIn PDF document text
    • http://boki.hu/editor_up/74241388589.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/e37ccda78e7d237f3cd69216a2f7df4d/xikez.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/goxumixomomizezufabida.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/4d0acc56c87fab0c6c02d77f35d4615a/65698436731.pdfIn PDF document text
    • http://indecomavo.pl/userimg/inc/wizejumarawowixinateludib.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c68ad4e846---88304874864.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/lofuwolorukoremikuki.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/kefupif.pdfIn PDF document text
    • http://maytinhgth.com/userfiles/file/pesapodalugiluduwosesuxo.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fab33e5a2---bovuk.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/98579435019.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098483070289---joxurolegajobotun.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/47be0a5a33f37e19d8b9f2746b842e14/52315863156.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/h73jam2ec8a21oi3ihr05ddhi4/80930690962.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/f675ed0183c18f9f6bdceb057c6ad869/xixuvozuwasevovosejo.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/kixomolalenomebukux.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/gazanozu.pdfIn PDF document text
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/38837449830.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e94bb8c425---23665506275.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A2 10772 bytes
SHA-256: f0db26fcac8157646b4cd63fc7605fbf427947afaad762c76b3172d01b8365ed
font_01_sfnt_off00010e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3A 18064 bytes
SHA-256: a13bc988fff6d10d61de99919b52bf051798987162cf3a66092f4023389a95d1
font_02_sfnt_off00012a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A71 19564 bytes
SHA-256: f6a4cc7f7c3573aeff130cda5c649dd0131f4c02ba983371501dfcb70c047f60
font_03_sfnt_off00015da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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