Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5223e6095428b89…

MALICIOUS

PDF

78.9 KB Created: 2021-09-01 23:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 87cd31b811e7842f71bd16294eb4fffd SHA-1: 8058e165c03e141c6a35d92c1bfe968e6e2b2d61 SHA-256: e5223e6095428b89d1616edcb32b5978416065db223587f67fcd76981c0bf34c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple external URLs, including one pointing to a compromised WordPress site, suggesting it functions as a link farm or phishing lure. The presence of these links and the overall heuristic firings point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://infrive.ru/uplcv?utm_term=5000+gbp+to+usd PDF link annotation
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f47cc183e---71585378487.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/kararonofamugiguwal.pdfIn PDF document text
    • https://ispartaprefabrik.com/ckfinder/upload/files/91783019820.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/43114564145.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/1e578f3f74761a4e30796936a16edcee/vobodixopozarudezejomugo.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f9489068b---pedosukewu.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160aabf725e08c---kurovexalimudotavoga.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/roxipoviwagovofivudiw.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c29094070152c1f8ce9eab71d04b6a85/wuzirazisevox.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/abc1670f557fa06a8491b7f793bb6884/32312404827.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/zogitimebusoparinixorokon.pdfIn PDF document text
    • http://polkovnik.su/upload/file/68901455538.pdfIn PDF document text
    • https://aedwea.com/upload/foto/wapugewedanidatizimija.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/marewabozegitofogiloko.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/q80oegto0bc95qv9nrc1ftehdq/42655861669.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/5dfqa9d15t6mincam78csnev34/sefujoroli.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6cc92666c3---wixosikosol.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e224db668---59598396186.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfe665e36f---juxafojutepemi.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d32649e3b2d---33349326919.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/19215576b54568346485ccc597535a0e/liwawomopaxixizopajebap.pdfIn PDF document text
    • http://adbuilder.at/ckfinder/userfiles/files/2616333944.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F8 10332 bytes
SHA-256: 3cf3ff37ecd670d2b94228d0f7c3124a110f8800aa7d5cf96183b114a288b10a
font_02_sfnt_off0000feee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEE 18064 bytes
SHA-256: 46590ef189dc754f9ec5cbc362d1fddcad7c6ef596a9e18582774867c8519665

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