Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce527f918eb0790…

MALICIOUS

PDF

94.1 KB Created: 2021-06-29 10:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 624a635f78be31fc6099d796dce98769 SHA-1: 9787e922d9001cbc836c0bcd4bd37c6de6a80990 SHA-256: 0ce527f918eb0790dd1841de744a90fcde657fb25c4082f3e483cb3383212730
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading a secondary malicious file. The presence of numerous links on disposable or compromised hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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.
  • 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 http://beerskiboot.com/img/upload/file/voxaraxoxotojugujibixili.pdf In PDF document text
    • http://pamat.ro/UserFiles/file/ranejutubuduvenawiki.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/aefed3ef2c1ff0233410a955628159d9/23974840325.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b434d0d1b---9175959147.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/sixaxoteduwapexulevude.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/ebcedcc14d5d0cf3875025c60a33107c/koxulelaxufowozibisu.pdfIn PDF document text
    • https://mnlex.it/file/pilagidevilexudixepota.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098254609297---48250620440.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/90231105222.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba686656298---fameguridujagi.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/br26qu6kk7iu5bp70dqc7nto0n/37878585305.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be07541faf5---17942395890.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/ruzojodok.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/3c3a34c8351c47695ddfb00c3da91cec/55137570402.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/29224313456.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c51353df2---vuridazuvebabot.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/92f6b70282812fb34d903d3c7870db1b/mibatogir.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cd64cc23f---derapov.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/82440040778.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7465d0fab1---zegegumofagijatajakof.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/c64d4845a4443e5aff1c76b1e8e65473/mukosuto.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/50640612518.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/vobukebobemuginaka.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/8ee0e292cdd9421d93c2e3278837bd81/43431334206.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/cb224f61abdf496e68d4c9e709750f3d/tikuvoximino.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/48549946342.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a2be2ed6e187053f9897ee80d8d36b3b/jegareba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=all+snow+globe+locations+fallout+new+vegasPDF 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_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C17 10784 bytes
SHA-256: bf4dc59abc39f4842b28ddd4276c2f845041fff0186e28f2540036f1ffa8b714
font_02_sfnt_off00013531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13531 19404 bytes
SHA-256: 505721937d3ff8803542367e4c394f816521cc85aaaaf8f271e1a1e3cee64c0b

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