Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e01b0969c01397…

MALICIOUS

PDF

85.3 KB Created: 2021-06-27 01:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d9712c8eaa59274f8eb14d6a2b1da76a SHA-1: 4cf62fc92337f5cddf79e0633204b0bc0415e01f SHA-256: 63e01b0969c013973ca136857497753df33fbfa7021302fe7c560cf421ba8ec7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a link farm or phishing lure. The PDF structure and embedded links are indicative of an attempt to redirect users to potentially harmful content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/cb5c98d5958fdb908dbfe71bbb1047d2/kikasunapuforu.pdf In PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072f9aa20e82---63666437978.pdfIn PDF document text
    • http://rhoptik.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/felerevazu.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3eaa9e839---14461172184.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/56c4eacaf87b1e7127d6d610d10eb431/lazuzerosovuwazesejonon.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078afabb345a---75276341630.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed2f468821---71227550190.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/riwudolujig.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/tezilonu.pdfIn PDF document text
    • http://skncn.com/u/files/38388677622.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095afe02ea18---miziwivedarovi.pdfIn PDF document text
    • https://hoalavender.net/upload/files/14197878249.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/relepiniwibaretivusofage.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/d3b14b407050b3a82ceef29a30e37f5e/zorubozo.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160726787cd463---8330053244.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/cof7ir6mprn2mn1g0mg3u7iud4/18631353331.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/3mh61gvocl6u2v0nvaslr19l8o/vepirokigolifosegodomof.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ade1347c3---95301701677.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084db4d80ae2---libila.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/mutoragabedelewuvuwukizot.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607a431e1c19c---99431517172.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/sututufabilidunimaruzilak.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/26204031531.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/vifozozinejamawaveresalaf.pdfIn PDF document text
    • https://www.alamy.coIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sonic+speed+boatPDF link annotation
    • https://www.alamy.com/licenses-and-pricing/?v=1In 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_off0000e7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 18208 bytes
SHA-256: 22d346b00743c8f1de7c0fbe760f3d112a061c71acde0f31d2e20a6b5512ec02
font_01_sfnt_off0001185c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13073 10576 bytes
SHA-256: 9b530997510c18e415868a95a48703f6cde58c86ec35d090cbf54b98dcf329e0