Malicious PDF — malware analysis report

Static analysis result for SHA-256 02cfa2004c5bc59b…

MALICIOUS

PDF

82.9 KB Created: 2021-06-28 10:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a204add20f79327097f7f22184027ee7 SHA-1: c5fff6712c76736410a26240edf2e21531d526eb SHA-256: 02cfa2004c5bc59bb67e00209f0e4c269f55e2fb251edb293bb62df1ae515ccf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://agataklimowska.pl/userfiles/file/vodovafitigugezoxatuvufu.pdf
    • http://mlkscholarshipsmilwaukee.org/clients/f/f0/f021f13c5c598389be7e913a1ae626ff/File/1974570360.pdf
    • https://anandamsanyal.com/userfiles/file/tifozerinegisojakobefefez.pdf
    • http://hevolta.com/upload/file/39692082544.pdf
    • http://gilendor.cz/userfiles/file/kekuvuvelaz.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/10998780475.pdf
    • http://allaboutdowney.com/userimages/14574645252.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/f7fb82e4ba4320970b77665d6faab349/nemudojunifowodezagi.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/umoofbrvt5p55jqtefvlotg7h5/dexoritibovuvadiw.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607dee88f0785---95636952945.pdf
    • http://szentistvanpatika.hu/upload/file/pemuvavozasizigadiganiz.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5546d4ea20---mutubetejazibenazosuxo.pdf
    • https://ascinfratech.com/clientprojects/trading/file/boxamuwokubofov.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/putigafodugofopuvevite.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160805d314754f---36626996308.pdf
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/74405843514.pdf
    • https://open-call.fr/uploaded/files/sudulidiw.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/tjqe362bqk83ekr0ublomp0nk0/35098074113.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc9f61e917---repakew.pdf
    • http://hanart21.com/files/userfiles/file/89773939953.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59b7bd27a0---12245502117.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/79a7d069a2aed664e34b0912fdc5e527/tasupidowabudeb.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f0c882221---41321290875.pdf
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/mitokotapavidolana.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=word+by+word+dictionary+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_off0000e15b.bin
a710808b5699c80333c1d12c986e29033bf877879887240dea489d5aaa0fc117
pdf-font-stream PDF embedded font (sfnt) at offset 0xE15B 17084 bytes
font_01_sfnt_off00010de5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE5 16792 bytes
font_02_sfnt_off000125fc.bin
6a5415668a05af8ee1e42498bf833562c59602c3a62f35a352fe609ce5f30781
pdf-font-stream PDF embedded font (sfnt) at offset 0x125FC 10600 bytes