Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1601de8d20f7e15…

MALICIOUS

PDF

86.1 KB Created: 2021-08-05 03:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: be17df92dfbdfe842044448bd9d1a050 SHA-1: 61ca6b649265b6255e57cfadeb6a6013067e1df0 SHA-256: e1601de8d20f7e154c386251bc83d51ed1efae7d9e8e4f9ae25b485b22fc816b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the structure suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3528

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=how+to+register+residents+welfare+association+in+chennai PDF link annotation
    • https://privatecambodiatour.com/userfiles/file/62825594072.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/20049354553.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/ec530d65b442437fa891aebcbf5fdcd9/32218931364.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/2f30fd5fef6df50b0d0b20850ce5c142/biremapugamakowamewajo.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8dee58f3dc5fb4a6ae16688e811b8ccf/belofiramobi.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b2f5f16e00165e5937644c6653219cc2/momesajajegimeremoxib.pdfIn PDF document text
    • https://ak-oroslavje.hr/files/tulubem.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d0ce81cd4---fikozonomikidakeb.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/8412f8293dcc8878af607fb73e6a7605/lefifixekowozota.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/82892319753.pdfIn PDF document text
    • http://cosmoscm.com/contents//files/furasux.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607211a87cd09---zuvivad.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/woxutaruxogemimip.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607365cf3d5fd---defujofodusukinuwuwadotop.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/7acc50a2ef47f5dad31b94dfccfade33/depabuvumolefadipogefe.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/11673043538.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/nolupu.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cfde992488d---28470720578.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/bodakalawonejesoruzabojex.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/39061824302.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/10822221288.pdfIn PDF document text
    • http://firegallery.ru/img/upload/fowamini.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/20dcf88943a5f7b7c645229093246fc3/vilegokufifikuwu.pdfIn 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_off0000f608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF608 10832 bytes
SHA-256: 047828286dea6c1eecd064a5bc61bedf2fe873d194a81ae40947ef2c7a8fcbf2
font_01_sfnt_off00010ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D8 16820 bytes
SHA-256: 40795d5e88f8a647fb1621ab8c63a81089c4a3497e1fe624b62ee7541d3aa6fe

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