Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70663f26696b395…

MALICIOUS

PDF

83.5 KB Created: 2021-08-19 13:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 64a4058e331cd56dd05e0af855ac7e5a SHA-1: 9db4388c51e24e9b70da0e4015f954ccede921ad SHA-256: f70663f26696b395f19e62ae0390a11d5283886ee275a5b0a24ccc95347728be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. No scripts were extracted, but the presence of multiple compromised domains indicates a high likelihood of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/af969d07f0833f5d5326af8ce899031f/51411652374.pdf In PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210728012112.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/nuvemotutazexetatovamu.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924a18ae91b---xenofexoxefop.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/b5cb26709f33171ad529986a3b15dde6/42873664568.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/newezape.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/rujirotobefonoret.pdfIn PDF document text
    • http://gtshotel.it/images/file/91313352215.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/56835736249.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/zoxenavusedalisi.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160babd8f03042---16640673532.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/saxerov.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/vibikewubara.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/rv212cu94t4mh9duoee9tesaff/94970990958.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/gaponibosozujofugi.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/940b5e68455b7b4bfd6db3741bb969d6/87334655616.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/laxonepisejotejes.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/19437265777.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/krtdosjnp0aalokmh8u6onkifd/bivetukir.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/2f4bf545769a672d886a6bef7980955c/50573484524.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d45c9366c---22555835451.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=what+can+void+a+real+estate+contractPDF 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

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_off0000e574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8B 10528 bytes
SHA-256: 99298f60f8ed01e600d3d3ee7f3d88722205eb3d4ba896547db1191bff4ee583
font_02_sfnt_off00011581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11581 16336 bytes
SHA-256: fc0d1bf0182d31e6cf352e0bbf1dd8c17a595849515d17e2c88484b86f773a1e

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