Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a79a4caad5170e…

MALICIOUS

PDF

90.0 KB Created: 2021-06-27 12:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 62c7f1d0817fa079016d58dbf74b51de SHA-1: 4304f71ebb475a6b2d9c7e8a8c30e552ec0c8454 SHA-256: e6a79a4caad5170e96ca5a9f884b1ced54e80d253726af1c8bf13c2988fd5fc3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to potentially compromised websites or external resources. The presence of multiple external URIs and link farm heuristics suggests the document is designed to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself is used to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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=trapezoid+and+triangle PDF link annotation
    • http://kubak-ubezpieczenia.pl/userfiles/file/jusojavoderez.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/21242501795.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3cefa390f---wemizibi.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/42984228711.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/zaranosofikubutefazaduzu.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/42396097657.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/65856068676.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/ac9ebbdb050cf7688b6148d29e40af72/49461266278.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/zibekapowupogox.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/65436252995.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/41a1412eef30372b067df933419deb4d/pumot.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/33eggivdiqjv2p0o6lelrs92sk/71134247904.pdfIn PDF document text
    • http://www.toptehnik.si/images/78402642736.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2122226b1---fofepekod.pdfIn PDF document text
    • https://susta.vn/userfiles/file/16692259611.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/92619282195.pdfIn PDF document text
    • https://egf.tw/test2/images/file/kiwuzekum.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/k8snboo64rcgcml0g7l4jlesd5/81313996444.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092917aa5c20---nofazadesava.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/jemaxunipekikit.pdfIn PDF document text
    • https://andrejc.si/files/file/60304498150.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/92h6678vo48007gbjgl60kvs6l/zaxetagutifagiboniwut.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE342 16168 bytes
SHA-256: 34837fdfed7e6dc9e8c1ebc45eabef1064a6e89f8cd536305124148a4af1fb29
font_01_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F0 10420 bytes
SHA-256: 59c0160d15d1379c0fd706cb93139ac89a5d5669e6293c3fb1e94c51ede40207
font_03_sfnt_off00012870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12870 18540 bytes
SHA-256: 98827d010629c3935244aee5daaa39a33c19cd569b1e2f05ffe891daf2b01068

Open this report in the interactive analyzer, or submit your own file for analysis.