Malicious PDF — malware analysis report

Static analysis result for SHA-256 320e30f59a11d1cc…

MALICIOUS

PDF

86.7 KB Created: 2021-09-18 16:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 441b57651e68dbb1ff5e603c149ab26c SHA-1: 48c11262004ee43705930c39a215f507be9064e5 SHA-256: 320e30f59a11d1cc7f027f2daacaaac3808b90464169d343cad901125651d4d6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://murielbellhomes.com/userfiles/files/4752016118.pdf
    • http://moto-bike.pl/userfiles/file/daganuvugebema.pdf
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/dumiwel.pdf
    • https://panificioilcavaliere.it/userfiles/files/wavateladuparobes.pdf
    • http://neuchina.org/userfiles/file/jazasotakoworibas.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/vb0l4rgc1do4cu7d45dk0tace3/vomafik.pdf
    • http://thechitay.com/uploads/userfiles/file/71709835703.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/cd3652f00a7a2716ece6ca3861c91826/jofeb.pdf
    • http://bestbelly.org/content/files/files/xilikabe.pdf
    • http://roocenter.ru/upload/file/42747794266.pdf
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/monaxurowazatojebituwama.pdf
    • http://yalcinsezer.com/upload/ckfinder/files/44868592459.pdf
    • https://saatyapi.com/upload/ckfinder/files/37334514556.pdf
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/8095780681.pdf
    • https://speakingparrot.com/upload/ckfinder/files/renabakefedakodo.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/a9160194eb45693783dfa064dc415a50/jajedamosusopitunoture.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac4aacb85c---sigoku.pdf
    • https://fajanav.com/aym_image/files/65402335461.pdf
    • http://czernavendeghaz.hu/admin1/file/xokagu.pdf
    • http://homestationrealty.com/userfiles/files/95521049708.pdf
    • http://hejia-ele.net/upload/77583079051.pdf
    • https://holcom-wd.holcom.vn/webroot/img/files/59727261307.pdf
    • http://nieruchomosci-swidnica.pl/userfiles/file/60396649218.pdf
    • http://fsgzb.com/upfolder/e/files/20210909195330.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=top+10+fps+game+for+android
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e455.bin
c1e9f46fd3b46a3647cd9eab051dc96bbefed5e3bfd51ff0c0ec8480a895d6f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 17524 bytes
font_01_sfnt_off000111dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111DC 16792 bytes
font_02_sfnt_off000129e9.bin
943a2a548752ab974b1d50e977f6fbe8ff115ca936f748011e155b73a5299242
pdf-font-stream PDF embedded font (sfnt) at offset 0x129E9 2228 bytes
font_03_sfnt_off000133be.bin
32b909251dda5d59de53721fb4ef386aa4386f73dfb16e51bff10f709eb79d20
pdf-font-stream PDF embedded font (sfnt) at offset 0x133BE 10832 bytes