Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f13ac5ba72ff59…

MALICIOUS

PDF

81.0 KB Created: 2021-06-28 12:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0abd32b308b86942747a4fbf9d4ea51 SHA-1: 1c56b253ae3072716f5749e2b40436851e578e9c SHA-256: d2f13ac5ba72ff5921094c3609091a9b4a912f98bad45a0f2eac706b81cad369
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these linked resources. No scripts were extracted, but the structure suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/cb055fa1326d3fe74dd6002c7a7c8d2f/nezilen.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/ee496c30e5de7c543fd65b13a9df6fa1/37210339917.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/bjla90rt4landv2o13i2etr2i2/55493211119.pdf
    • https://liniagdanskzydowo.pl/files/36336774678.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37a0ef2743---wekesoxeziwevez.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160777eed8b9c8---perisesidevikita.pdf
    • https://implant-drill.com/userfiles/file/54868598997.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcf8426aae---tizogebiniwewawem.pdf
    • http://braciszewska-klimek.pl/fck_files/file/58026863964.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/cj5l2r78etm51aprg03g89k0o0/femajeneziwijipe.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9e7b64feb---bisebex.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3835634a59---4901782589.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a45579edde4---80692718756.pdf
    • http://autohondl.cz/userfiles/file/jigasisadizekelunovopeme.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082f1cf74317---bezatupewapupavepa.pdf
    • http://alibabashipping.com/userfiles/file/pamonitimevetakaxu.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/b8m9ueqfntjv0r00b0umktevl2/92285760274.pdf
    • https://eternalbliss.net/file/puzetiz.pdf
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca036e6048---lijizabumixumufoxedefafed.pdf
    • http://oldtimerclub-thueringerberg.at/images/file/9737917184.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/jji1ovl1l6sq2a732i6qrhohsu/tizetiditexukepedi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=family+and+friends+5+workbook+pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d935.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD935 16792 bytes
font_01_sfnt_off0000f147.bin
15959c097a14c1c95ff104736a033daf45eaf7b4c0e82288cf20af91c156716a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF147 16520 bytes
font_02_sfnt_off00011bd8.bin
6f7cfee1fe5cbeed16cd260b5f7fa0df6dba34dfa5cb3342ccd69633a0411b96
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD8 11104 bytes