Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5a19b446bb4c4a…

MALICIOUS

PDF

83.8 KB Created: 2021-09-05 09:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5c7e4102df3f5bb106ff878b177f2c96 SHA-1: e21931b3c4e33b2a4c79ceebb042333e5d5deec1 SHA-256: 2f5a19b446bb4c4a8f60868d1c1ac771f8a6e3608773774c5aadd38a942f63f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://rentbucharest.net/images/userfiles/52447759298.pdf In PDF document text
    • http://amuseonline.com/absite/userfiles/file/viverilowepitutuvemajirig.pdfIn PDF document text
    • http://lulanjina.net/upload/files/36268950829.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/zevidurava.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750ba4cc61d---zasubotopijetad.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/rekijukam.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/zoduxakokux.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/kozugajegejogomeveloko.pdfIn PDF document text
    • http://fusiongrup.ro/userfiles/file/kipivewusuvijazejom.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/dodarum.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/1bdf1e1f20f4537ef58fc3596926dac2/dinudegulijiloduwuk.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/59668537059.pdfIn PDF document text
    • http://babamoleskine.com/files/file/44377944473.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/17651922739.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/27mbmlcc5qbj2ld0abi3gjnv0u/13559194881.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/2a8787108f76860bdd9f013870625372/dewudovixo.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/duwenobujososokuzazite.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/wowid.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/ai8jq3k3f0et2cehmgs237ou97/36264506818.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd99ed927b5---70697875292.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/vizawazigemaxewu.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ade442896---66166655313.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=advantages+and+disadvantages+of+payback+period+pdfPDF link annotation
    • 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_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB6 11144 bytes
SHA-256: f3c11b63b48d8a3f6d972c6a232548d13f5869f3d9283b89b91a7edb1c1a514d
font_02_sfnt_off0001148a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148A 17324 bytes
SHA-256: a7b342737afcb89cd3a9aae3c51f6d04733012281444555ea49addfb451587d1

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