Malicious PDF — malware analysis report

Static analysis result for SHA-256 6174da17cd7df379…

MALICIOUS

PDF

84.6 KB Created: 2021-07-17 05:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bf1839cac5ccccdcd4398ea1df650c47 SHA-1: dc259c3147602a63873c3efb7f44a371d16148d1 SHA-256: 6174da17cd7df379e0d82d81dbba982d2274d762869ffedd7276a5df282ac224
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to URLs hosted on compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support the malicious nature of this file. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

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://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/1053e739a6013aa7c8920b791de947ad/juvigizasular.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/22b24b605cdab898f8e57c457a66c5e6/befigiwa.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b88b1b5551---mobobofulobaj.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2b2291143---75894039381.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/zinujirixupipipejemeg.pdf
    • http://curry-box-deluxe.de/userfiles/file/vifiwukarerimavatunorapos.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5534be9919---16686234995.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1b76e6e9f---84430600175.pdf
    • http://shipagents.nl/uploadfiles/file/fisokajujokitefawagipaf.pdf
    • http://rollfactorytogo.com/uploads/files/68325551903.pdf
    • http://naucseto.cz/storage/15160151642.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607162dbb060a---deponapizavo.pdf
    • http://pm-ural.com/uploads/files/koxat.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a0d98a93d---77176584506.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c534de73a---73312490921.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab53c44e6ae---wikefusimatasigun.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e694cb1a5---xudulilixi.pdf
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6047240509.pdf
    • http://lumieretvie.com/userfiles/file/90942590934.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/1jp60udmu8oi60d5t61p3r0bm0/kazutipe.pdf
    • http://piqiso.ru/userfiles/file/xoniwenewokizolizuzi.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160740abf111e1---21701868547.pdf
    • https://best-label.com/upload/files/pemarawujiviputesosidawi.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9cadafeac---bededubazaxululopuninoma.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+insert+pdf+file+into+powerpoint
    • 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_off0000e8cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 16792 bytes
font_01_sfnt_off000100df.bin
033823e149230a5ab1c5a15e4599a4cfa5d5abcdc5922915ce28e9d780aa3824
pdf-font-stream PDF embedded font (sfnt) at offset 0x100DF 16948 bytes
font_02_sfnt_off00012d5c.bin
89235ce6d1dbfcb20319aee3fa069a29215acdbce1a3b9aa267fef6974f3dde5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5C 10404 bytes