Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef284e6798658aa…

MALICIOUS

PDF

82.0 KB Created: 2021-09-15 21:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3caf2407d6d3108b82d3addcd2dbed15 SHA-1: 0d7c46ddac2c48c4847ec2b1e2edd94d993fbde8 SHA-256: bef284e6798658aaa61d224fe8a5520cb45992a8ffaff565eb0a026a11dff8b8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised websites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download' call-to-action further supports a lure-based attack pattern, likely aiming to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://studiogallerani.it/userfiles/files/35534849343.pdf In PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/sutabofozepoziz.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090702181673499.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/86718917606.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/6225028889.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161410159df44e---bipisutudapebova.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134c17dd803a---68926970054.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16135b732e65b3---tinuxuj.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/21459539176.pdfIn PDF document text
    • https://andana.us/files/files/vajoriwupo.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/jakabitiduriju.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16140c7317b715---biruxodijilixijirob.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/26459624704.pdfIn PDF document text
    • http://idcla.net/upload/files/pobezefabujanavoxoboga.pdfIn PDF document text
    • https://12shio2.com/contents/files/73336350886.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/rilasomovavagi.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/wukonefuregososiralunafur.pdfIn PDF document text
    • https://ratoempat.com/contents/files/36354078556.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/89883837979.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/44424675365.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/46518012345.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/20722440691.pdfIn PDF document text
    • http://tootooair.com/FileData/ckfinder/files/20210909_D9FD494261B4A43E.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/dulixow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=download+game+zombie+gunship+survival+mod+apkPDF link annotation
    • 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_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 18068 bytes
SHA-256: 8f7ca8c1dda18900d232049b9ad291efc4bf47a87928f2c88da9a91078931a3c
font_01_sfnt_off00010840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10840 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12057 11288 bytes
SHA-256: bbd7dc89251750b8b5a806a6795d39bf62166bd5de8caf2638451dcf646282fb

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