Malicious PDF — malware analysis report

Static analysis result for SHA-256 7deb5230a232803e…

MALICIOUS

PDF

96.8 KB Created: 2021-06-27 14:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5915d986462c7bd2bc8eedb27729f764 SHA-1: 90adee169e9d91f209a2cc2c5e424aef2ea78d7b SHA-256: 7deb5230a232803e47eb0a71a870fde91935c071cba128b35ee54f2fd378bd96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection for phishing and trojan activity. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=holt+literature+and+language+arts+third+course+answers PDF link annotation
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/gegubovomiza.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/bcaee0a414bde45756c6bcdc93f953aa/87638552889.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751c50b2a18---84335119454.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/kujajefolosufofote.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609402e2a0885---9370902174.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beecede4403---gufajen.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f392db0214---83736643639.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/da4df1ac5c2cb6c0aa1a66561b293c81/xurokoxigajoxif.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad0869b97d---mogefawawub.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/38651745335.pdfIn PDF document text
    • https://cochleartudaskozpont.hufiles/tatejojot.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160742ef8e49e3---laruleliwo.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608bff51eba97---muzobipiworuvofomak.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cbebb445c---11683815573.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/44b33646a40051b6e51cdc7bdd11c750/judepewisamipusesu.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/kedabarojerojokanapatovu.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/ceca9f0354bbbe0cea9ea1d2d1e2ff0e/sunifomofager.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ae701ae06---35772449973.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ab9de050---91620046818.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/9cjoggtnjuj0ea399no54fp9b9/gesopujipigon.pdfIn PDF document text
    • http://stylekd.ru/files/24535274567.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/84b77a76cfd8befbc476692ba554b656/28444381979.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_off000113ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EC 10828 bytes
SHA-256: 72e159d48a71e314d3f12626a2eb4fb70fca843708ed8acf952a2a89eb10e9f5
font_01_sfnt_off00012ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000144bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BB 19196 bytes
SHA-256: 1d94f253a0e9b043728241723079d83cca3c15543df12d4fe04465078356521b

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