Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7f890d5738fd32…

MALICIOUS

PDF

132.3 KB Created: 2021-06-26 18:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9cf67d28ccc494c4692aa7d86738b7eb SHA-1: 22f1a5d26197dc7bc443f920165a517f688c4d0a SHA-256: 2f7f890d5738fd32ffca3eb5ac1a73a01c88b27682c43b0cebb82dbcca60f2ec
156 Risk Score

Malware Insights

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

The PDF 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, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute phishing content or malware. No scripts were extracted, and the document body was unreadable binary data, but the presence of numerous external links is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/f2accaae0624910836374fd600ff3528/pefosok.pdf In PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/jowom.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082fb4979623---gebevofiravezozeromov.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/577aa96107cc4baa17dadab6be8354cc/81314534191.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c388f52437e8610b83ba91fd9c200ce0/78549727130.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/sl4tht719hhfbdme7dgnggqjq5/4264956338.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/fda8a51f11b857bd2a5e7e5de0dd69db/81019644948.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/nelozigasimini.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bd2034fd7---nitipodod.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/bokozetegekazotameruw.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/3365601791.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6b4917d4b---73531962873.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/kopafalegil.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2910b887ae---93671477189.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/71969689968.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/58884192700.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/5292ee65e9e5732606109624f979ef32/63149385628.pdfIn PDF document text
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d62c2695f8---55789888085.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/df4ca71840b39cd02af6c1dc0cc332cf/87036806035.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b9116f49a---40432096941.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/150bf2472138b6ff23ccbea5227e7058/88568278337.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c55d8b38501---14430952009.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=candid+pic+quotes+for+instagramPDF 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_off0001a19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A19D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9B4 11192 bytes
SHA-256: 2cdd31c40689aa66166bb9e194799cb08d312903262cc9a150642a2da047d161
font_02_sfnt_off0001d36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D36A 18620 bytes
SHA-256: df2cea89012c41f1ff98ab8f14b23f03759891ea6ef81b1a1d8111e1919b2f0e

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