Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a1f837d71c7caf…

MALICIOUS

PDF

95.4 KB Created: 2021-06-30 15:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 462cd72b954dce69092c776e626e0a7a SHA-1: 842a18a44072da295efa8a8c2f6ca67c2da29250 SHA-256: 06a1f837d71c7caf8d2146cbf756eaf7b5d59997766fcbe8dc7d566dde948789
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. This pattern suggests an attempt to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://ph2020.org/FCKeditor/file/98490241540.pdf In PDF document text
    • http://ampletrekking.com/userfiles/file/31857609130.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/fugojuki.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/8830a1f7fd9df1326579e432ee2e27c2/739261050.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/jalazazemurisuna.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16070638c4d8d6---wuzusanigudeda.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/9816abb8bbe6d3ba8be89c76580d5bf3/gerupinujabiwifaxararid.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0006fb7f7c---pagutitoxiva.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/4c6f8cd6306d0b2bb948edb15fbe58d7/jimaluvegasupamipimazev.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/bavudukiwigorewatozox.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/tg82aoorclj7o8ghtmnk8050vv/xilatosenit.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ed7b68d930d33594f6a8dfdccbc124d8/datubamu.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/b11eec078808b9f9ee24969ef7b8479a/41048248254.pdfIn PDF document text
    • https://lncl.org/ckfinder/userfiles/files/60820756037.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/pikopupepisabuzanawufad.pdfIn PDF document text
    • http://staropolski.net/Upload/file/jepij.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/2fa989c40021be175df4ddaf1aecba81/27820206247.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090950e25b16---93573171783.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/vizowulavaseduwino.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/10b2469ac29d647c7186b979a3e76ed3/43078580638.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/31538408841.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/51646413585.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/b4b53929bbf69a66cc0adc152a626da2/63327322493.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=agile+for+practitioners+assessment+questions+and+answers+tcs+pdf+e1PDF 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_off0001115d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115D 16992 bytes
SHA-256: c6c8a46ef57b0329c6851baa4438b727f9818875fe4d0f5e362afebbc76b46e1
font_01_sfnt_off00013d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15585 11328 bytes
SHA-256: 1081e95adaca596d4a0a4db7d7b93f000bef429bdcbfe347f03df036219faf74

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