Malicious PDF — malware analysis report

Static analysis result for SHA-256 07072f207d894082…

MALICIOUS

PDF

99.2 KB Created: 2021-07-27 12:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 34a0c01ec0a29a87147ac8519729a88d SHA-1: 58a3e1bcfeb059b1df2ac9428969ea0bdfd437ac SHA-256: 07072f207d8940826fd9277a7dbe1b8d73af952e4ece09f6e855033061f582b4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm and a callback phishing lure. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to direct users to potentially compromised websites, likely as part of a phishing or scam operation. The presence of multiple links to WordPress upload directories further supports this. The document body was unreadable, preventing a more detailed analysis of its specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160e798310d710---nuwosewizades.pdf In PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/hjc2lh7cv23lbbcv97o2dtdv0s/wotasuxe.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/44486329739.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/94840773343.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/tozevixuwosi.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/c9dead4ddb734ac562008ec02e95cc19/gegosatekojana.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/8g7ru76fndin4ocbolpsn0mt32/3466129534.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cc0e858106b---40668583189.pdfIn PDF document text
    • http://solsethreunion.com/clients/f/f5/f56c6d7ba488b74ef40bd02d3fc4d0b2/File/31326162278.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/nudag.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/57869384208.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210617_9D5539879F117E13.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/58baf660fa2c4a25c947a1897404a9b1/14590015647.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/61691097177.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f825f9bc12a---fixowolive.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/53604889939.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855d7e72395---52672474113.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/289ju0ip0i4j505et29i1nin30/jazefovadodunadirasito.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/39251191192.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/reravaw.pdfIn PDF document text
    • http://juha.be/_files/file/sobisaxojawitor.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/83727988507.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/85506958651.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/26663501871.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=dogecoin+price+today+predictionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001071a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F31 10588 bytes
SHA-256: 5d2d274bfe82e3569c85fcf0378ff714c32d69d2ea4b7922f8dbfb393accfa37
font_02_sfnt_off00013745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13745 18252 bytes
SHA-256: c923f9878b32a902dc201ac17af4d7755439b093633e70c518c65d2f93fb8a34
font_03_sfnt_off000167d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167D3 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467

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