Malicious PDF — malware analysis report

Static analysis result for SHA-256 2327944d7aca9d39…

MALICIOUS

PDF

83.5 KB Created: 2021-08-31 15:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 05f0310fc32ecdf25cc398febedb4f12 SHA-1: 009611f325f390c2a00ed46e5a1d90ad8db3bd64 SHA-256: 2327944d7aca9d39e7527011884a23974c28159905e29eddb7b42f73b70132d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://wastran.ru/uplcv?utm_term=how+to+read+drum+chords PDF link annotation
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/561ae77297fc153225c9f844d19f83ec/femisabutexomutor.pdfIn PDF document text
    • https://ienter.bg/files/kadikajivazenunalo.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087697a780b6---33677183172.pdfIn PDF document text
    • http://zuche0551.com/upload/file/woloriv.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6a6e1a6b2---81374407897.pdfIn PDF document text
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/43051834337.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/defeporabeboliwigupedulud.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/pirejoge.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/eb5250e28c29cc4f837735bd719231c4/mepatitawibogukigexabul.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/09af3701371bef1bd7265dec8a3a1b1b/60360784693.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608254564dcff---bajuzevukozotulasuwovuj.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/zejapupipikikepepe.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/ludozufuretuvubi.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/xukezo.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/76535233502.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/96294953188.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/98786395988.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/ziruwezorirepimovinupego.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/9933830225.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/damireredejexodopajal.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/f52cefc8d7bd160b7575b490d76b8e43/runifik.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/jizupigonuze.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/13525942687.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/905e4d52a425245d3ef074265f98768e/45976863081.pdfIn PDF document text
    • http://gardatrans.com/content/Files/liluket.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DF 10568 bytes
SHA-256: 9c478e28666a91a4ca4b88df63fca88e889d0149489e22932e6ef6ad0c86d9c1
font_01_sfnt_off0000fa08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA08 17492 bytes
SHA-256: b6338a25b0d9df8980601c33b2493e2ea0e03d5182194a5f0acb2a29057599c4
font_02_sfnt_off00012717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12717 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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