Malicious PDF — malware analysis report

Static analysis result for SHA-256 64abac99f69e4b47…

MALICIOUS

PDF

80.4 KB Created: 2021-07-26 04:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fb6f98fc164f4db4c608d2aefc3aa82d SHA-1: f281c5393cc16e3edca861331ada2f13585a4d08 SHA-256: 64abac99f69e4b47a6201ec2b0ad5deff8f85fedccda7c5096e4eff7161934e1
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are likely part of this lure, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/905890c2d6243283fad2c1fe0da63b48/defupudolur.pdf In PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/aaa6585ddffcd2a02844493f5d215372/24346005101.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/c9430712877edd0ba0192fba9d591c6a/wotajovudutokorabedol.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/gtpovit4momg1pfs86gei7188t/limaviledupubona.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c67d72ccef9---telinemipagukamogejaro.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609413c48a27f---5285503742.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/wijokekegakofaj.pdfIn PDF document text
    • https://haidangpc.com/contents/files/11396636450.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/lvc1c5albc0t98ck4km4vb95kt/giroxurologezilifugapes.pdfIn PDF document text
    • https://nasikampung.info/contents//files/65255317453.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c081b527259---mifikozumiwakela.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1609461942dd76---vamabonamugixaf.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/34259218739.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/kiwumiwov.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/i1v7hjn4gk6lbdj3bcrq57ke2n/ginawiweloxivexetipatoz.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/c90944fcf6188e06790622253243e7eb/kanezomametoruwexejumixaz.pdfIn PDF document text
    • http://talleresjpg.es/img/file/9020136431.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f2caa67bf---87557696389.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16085aa9098b59---zezapitupali.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210611145237.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/89881785702.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160e5f3f5b6de0---40198145543.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/d86e6521d3032b9bf1a83dea747b2008/11145748868.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/15459a66f99b7a18d435763028ace539/95914799418.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=missouri+pdmp+dispenser+guidePDF 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_off0000d9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DE 10524 bytes
SHA-256: 7722def930389ea89595f9f9be6deb76b207d4f3ce9549b18e12a37d0dec6457
font_01_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A0 16172 bytes
SHA-256: 882c0c302f247676401f7b54ff94b224b45f23768fc2ab47a81f435b77ca0b29

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