Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd2d06b03d09e23…

MALICIOUS

PDF

83.9 KB Created: 2021-08-19 22:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 994fb1e6415a103df4fb9649b362b98d SHA-1: 9f4f24fbafa25814efc45a11a05700727f1049ea SHA-256: 2cd2d06b03d09e23dc30a1e3eaffb029c55dbf94cc9369ac010c4a901b62c1da
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farms pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The primary attack pattern involves luring users to these external sites, likely to deliver a secondary payload or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coretry.ru/uplcv?utm_term=mario+odyssey+walkthrough+pdf PDF link annotation
    • http://avrig35.ro/uploads/fck_editor/file/37803610526.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/pr8jlhjprmdpo3an36ndon03ir/tofipenosujizujutex.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610b7acba584d---84286623512.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/tunixepezix.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/5186073456.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/97afeacaeb7ca5f039c596795f8d4bee/67372331580.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/watowugogipuneviguzot.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/pbge0btnfq8klpt4l3jh7cq3c1/71099912527.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/famaw.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/8rdctaaeje9okkcptvqrb43au4/jovepevuravovelaxo.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/rajolalegawuxorire.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/f1d1427ffa02be6b95d27111a4ecba9d/82554355719.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b674df226cf---dezak.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/c9fccf9ab0ae0b2d2b094895d30f69cb/savalixoturibe.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160811759eb1a1---dakegixivizelutinaxiped.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd3a8e49a6---tafoja.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/kakekolilodatudotutuzunaz.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/rinigowupiwiwaxexibosuru.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/zuvebijurisit.pdfIn PDF document text
    • http://peoriamayorprayerevent.com/clients/1/16/166e3f524b51ec168ebfd48f86188a1d/File/gemasulonovifejeteri.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f64da42a9---5390514063.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/2413819829.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/rotib.pdfIn PDF document text
    • https://ptogel2.com/contents//files/25254413420.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fdf900a43---sovipamojuri.pdfIn PDF document text
    • 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_off0000e3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AE 11060 bytes
SHA-256: a7ba4d68b83e656ca913dafba25b1d70b9da2b91fd9f3ab99afe01ad66843942
font_01_sfnt_off0000fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 17096 bytes
SHA-256: 72f8f221b20e3899b5f204618c0b44d5114f7f4469aab0c3ddbcd2b65af215e1
font_02_sfnt_off000129ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1