Malicious PDF — malware analysis report

Static analysis result for SHA-256 650e25a55c6c7f09…

MALICIOUS

PDF

75.5 KB Created: 2021-06-10 03:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 01d369c7d7c712756aa4d5591d3f1f1b SHA-1: 8ff6b56a63615764f67df887482f209529ef7970 SHA-256: 650e25a55c6c7f09e85f58dcf4f503087ae395066fd2214850fd37d1388452c7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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 https://synerhu.ru/uplcv?utm_term=jurassic+world+evolution+gameplay+free+download PDF link annotation
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/84846d5366ef253106f436c9bc7b5546/2660889752.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/2b421b97c5936ea5ec4a8c0b8e485ace/99912721323.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/41183172641.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dd925fe9d52e35eb75f1281fce8a1dcd/ropotunigax.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/ta26puu8saaitr8nf4ujbpe2hp/48341016662.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/1f62a87fd33dfc6fe3f74bbe6cfdc079/31250966316.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/jiremoruzukep.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/gazududimedidajemojok.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6ad2d8660---gigigexififatanir.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/74849571176.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/6c3a1c1157500ae6ed839423d0f9c703/gudapijowemuvidor.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160ad182eb79f7---fujamafopubikivu.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608125dd2bbae---sosipizoloset.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/53517999831.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/72825407803.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/f3af2409290ac3766448c99297df4602/58543052098.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7f2e0029e---6605070809.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE028 5716 bytes
SHA-256: fdadfe2a8baf37e3c797cb44a490e068e4194dacdf13db8e8291da7813ee6223
font_01_sfnt_off0000f3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A5 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000fc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC32 10564 bytes
SHA-256: 662031965624c0a302fb8dfbeb9f15f02e3183e769548f8c458820904324edfb

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