Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba30ee93ef256e0d…

MALICIOUS

PDF

86.5 KB Created: 2021-09-23 11:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: da3458a8fc2fb8d053f7df4222f14658 SHA-1: 3626c5d1b2748b26f14100be1b3fdd66608d3d75 SHA-256: ba30ee93ef256e0d78cce3672437d50016a30a3657e4d2aa516e962d412b0f48
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, despite some being marked benign, suggest an attempt to direct users to potentially malicious sites. No scripts were extracted, but the overall structure and heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://familiegravesen.dk/userfiles/file/26235879332.pdf In PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/semubuvusiwiwunik.pdfIn PDF document text
    • http://salkim.com/userfiles/file/ganelagaxotuzute.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109011333541461.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/foboxow.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/lemigonefoxujekutavowozif.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/tomepababedowef.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/91547523148.pdfIn PDF document text
    • http://easy-sleep24.de/shop/images/editorfiles/file/27423507901.pdfIn PDF document text
    • http://robbes.nl/media/files/favulizanes.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/kiluke.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/91834653580.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/wubad.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/gotuwipilanexiv.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/vitojenezinaxotasigerigo.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/divewufabasilipupipowil.pdfIn PDF document text
    • http://ing-ka.com/user_img/file/ziputamimagofaju.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161461b4918b83---wovutegipavub.pdfIn PDF document text
    • http://123flower.doweb.kr/upload/files/rajutuwakewunugi.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/gesizaluvev.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/75891178199.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=roots+wiki+androidPDF link annotation
    • https://easyown.ddproperty.com/datas/files/54588438443.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_off0000e962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE962 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 10284 bytes
SHA-256: 15130e0f73a182cfed9591b21b2688f245a8219f9a26f7460e69e2f7ee57ae13
font_02_sfnt_off000118cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CF 19884 bytes
SHA-256: 05cd61fca1f76d5f4190d1d82f021a6caef8908af117bb1ddcf1231a9bad7a7b

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