Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bc0a0a4d14fc86…

MALICIOUS

PDF

92.8 KB Created: 2021-07-03 18:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64124c6855aa54b2b003a466407099ad SHA-1: 10a6b3b3dba1454e913574907c29d86cd523bcec SHA-256: 75bc0a0a4d14fc86a36450b2cfba18d51f9a971e557f118d1885855295e165b4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress uploads and other disposable hosting, indicating a link farm designed to redirect users to malicious sites. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing or trojan variant. The primary attack pattern involves luring users through malicious links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/a3c652f3cefbdbba59eea5d7e4f7de06/2651148276.pdf
    • http://newo.ru/files/files/tadokumigekup.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ee645e795---xodupoxar.pdf
    • https://ludifrance.fr/userfiles/file/vupitomusiwogajuraguz.pdf
    • https://watertorens.nl/userfiles/file/78512693583.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/9477d43279107fb3ac2f04bba5190550/47155194713.pdf
    • http://geologocarmignani.com/userfiles/files/dobametipibu.pdf
    • http://guides2alpes.fr/uploads/file/91280454515.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/76193d2439918e25e1ee4116234f11b1/negefogonudilos.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6d2c06349---vikogi.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/f8c20996153a4ccbf7cd5d50a6732375/kisomizeboseradupatoguxik.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089838c747cf---jutokusagojajulopozibila.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/nlhbb5618ltnudf2t424ff1mb6/77548533419.pdf
    • http://jnnycc.org/userfiles/file/kogusowuw.pdf
    • http://austria-ex.com/images/blog//file/kukag.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e989ff1244---lulopajorabosi.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/1567bfb05fde018b6b5e63880755a4f1/10891525296.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609679133beff---42192847788.pdf
    • http://appletechsolutions.com/userfiles/file/rizefeka.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/44adb6d2029e85879705772b479d17a2/sanegonulurem.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/ae1e9b04ee30f9e814981fa5f8715604/55030750961.pdf
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/fijetutobevadozowoje.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609435a1b8944---65180662343.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea97394690---40124503204.pdf
    • http://pcccphucvinh.com/upload/files/luvuligivojilogutululop.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b521b3e79eacf0b26a0497dfb5ee4f89/jabotivazojulus.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085bb4331b33---11673099923.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=smiley+tater+tots
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8C 16792 bytes
font_01_sfnt_off0001069d.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1069D 16312 bytes
font_02_sfnt_off00011ca9.bin
a173604e62248d533f91d0fddc4e6a765d83aa8ffadc89f6e4a51cf4f0c76c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA9 10352 bytes
font_03_sfnt_off0001340c.bin
2a68c7eea08cae2314598b5988f6585b8cfa3d2aacc042541b5b10222cac9a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1340C 18528 bytes

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