Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebf797da0fdc01e…

MALICIOUS

PDF

95.4 KB Created: 2021-08-10 06:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f6b96af3ff0221ad024cd45ba05f4bf7 SHA-1: b2ff97322db121ebd522102a640fb80d5c7379b0 SHA-256: 9ebf797da0fdc01ee7e366775721710125bd259c189a6f55482e2364a782f5bb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, as these are common tactics for distributing phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://synerhu.ru/uplcv?utm_term=how+to+use+a+sq8+mini+dv+camera PDF link annotation
    • http://dostrojar.sk/UserFiles/file/90677039431.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/tudapukikaj.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107246c885d4---58076468715.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/23046657249.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/paxaguzuxilosutobebexu.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/12317927439.pdfIn PDF document text
    • https://ms01bet.net/contents//files/69705579666.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/2960340fc018999fa68cc08ea96b952a/pavorafofutujuzerusogawil.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/81479724382.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086f50d8c25a---wibisowevinoputogejukajux.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/mabewip.pdfIn PDF document text
    • https://mmszke.hu/files/file/tujejomexopewilarugemoxen.pdfIn PDF document text
    • https://network-italia.it/file/31047532510.pdfIn PDF document text
    • http://web68s.com/upload/files/30300715467.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/hpu7es7cpbgpvegeb67d5n0lj9/ketuwudijitozevumonudi.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f34f38a4ea---xiguni.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/82569290456.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609269e4431d5---bikizonupukipoluna.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/bojazefumulugisarewefital.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/zikopapageso.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/33370429652.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/76016886338.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/talor.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_off0001059e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB5 11080 bytes
SHA-256: 900ec4ef3c451f7ed17b8c63767f9e565bd25c1887649c9a30fae8fa9b2391ae
font_02_sfnt_off00013759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13759 1668 bytes
SHA-256: 0a4af374cb035e676210909e4790276a619635896d879aefac6ffd5912e9aefa
font_03_sfnt_off00013f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F49 18604 bytes
SHA-256: f348010e3d30748157702120ea0bcda163e143a4e19617fce44adc90b4606743

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