Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0012ce64c29281f…

MALICIOUS

PDF

78.1 KB Created: 2021-09-04 07:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 487792a26e7fa86ef74ce3ccf542f3d6 SHA-1: 22c6df9899049a397473d173a46aeed0148b25c6 SHA-256: b0012ce64c29281f4cfb29eafecc7c061811eff1e7af2d8dd06e56450c37fedc
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate maliciousness. The primary attack pattern observed is the use of these links to lure users to potentially malicious destinations, consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/dfe59a880df1d19ea3899c5d5cd800c9/suzifopix.pdf
    • http://rzn-house.ru/upload/file/gebinozitetepi.pdf
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1624705682.pdf
    • http://savvyais.com/userfiles/file/63842979114.pdf
    • http://hyundaiokla.com/uploads/files/33022600085.pdf
    • https://landtop.com/filespath/files/20210824123257.pdf
    • https://tedvandergulik.nl/userimages/file/vigerolorutivogizefavized.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2750cd1397---solopisulonudomuk.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/suresunezalu.pdf
    • http://chromatographvials.com/d/files/rikatabunegajavogise.pdf
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/jikativoxijowirixed.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/qmh2ogts0tru9mcj39vti906ml/6612258899.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9db0fd1d73---pisazozufez.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/37a93lo83namtt3h6nruk737d5/33468345124.pdf
    • https://airshow-bg.com/file/mubikofevubinujetunezoteg.pdf
    • http://kashima.cc/userfiles/file/36350651780.pdf
    • http://veterinariogiardinelli.it/userfiles/files/dedujadajuv.pdf
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/witezibosojuf.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/2mba7mm4gvki45fo96n3k4h8r3/89802865586.pdf
    • http://kinel-hunter.ru/upfiles/file/31782010343.pdf
    • https://mariellatriolo.it/public/file/53738157969.pdf
    • https://rivieresoceanie.com/userfiles/file/babeditutoked.pdf
    • http://win-sonic.com/kida2018/ck_imgs/files/20526139230.pdf
    • http://ankaraeksioglu.com/resimler/files/80931761485.pdf
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/vajemirivovi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=unilorin+jamb+admission+list+pdf
    • 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_off0000cb1b.bin
fa511997ebca969777af660d7c803983d2772e0ec49b953bdf0bccdbf863347c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1B 17856 bytes
font_01_sfnt_off0000fa0f.bin
12ec7e2dcf4e6b27fbc773446dec4992ab3f459aac06ad8e34a39604d6fb6837
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 10804 bytes
font_02_sfnt_off000112a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112A7 16792 bytes