Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b94172210e96a4…

MALICIOUS

PDF

75.3 KB Created: 2021-07-22 13:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cf15546b8b93fac9ab41ab09b0c32f8a SHA-1: 855d49bb0fcd4d5853b340262029e26e106515dc SHA-256: 11b94172210e96a47c5f64bb885fc0a125e129aa7a5c49dbd0d452b3c95a35c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The presence of embedded URLs and the 'you just got bamboozled' UTM parameter strongly suggest a phishing or social engineering attack. No scripts were extracted, but the PDF structure itself is used to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://phillipsbricksalumni.com/clients/56168/File/79092885255.pdf In PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089322dbc2e2---felufevogusetujude.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/70hbauqaekuulsihd1vvtprq3u/zozawigigujisukaxosegik.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/45276547462.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/92956220135.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073fc3771e94---27110409728.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/lemapafip.pdfIn PDF document text
    • http://staropolski.net/Upload/file/38386817519.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/61607857449.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/bee4211a1e19d9009d5534324b09b27e/2057797669.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/ragepirajiziratixopagi.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/72118992421.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2cb63af6---44039257968.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/msiboka5dloiar5hs0s4cdg0k0/mefiwegoxitebolinepef.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/a98d9b0340bff58823ff6e94aba6968e/65794539617.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/waluj.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cb4ba2e52---71340745914.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/92878008916.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/38368568767.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/99138934584.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/9a000660af71afeabd0913825da645aa/luvawitiromewukazutabo.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/45674675838.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/16795691657.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=you+just+got+bamboozledPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC162 10708 bytes
SHA-256: ce771fa08d2b3bdfd09057292fc6ef77a3a24cba7bf1b561036786603e3ea2f5
font_01_sfnt_off0000d9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EB 16828 bytes
SHA-256: 2496bf1f58ad5fc675b7adf40f4c6b6de4f2dabdbae05d686c6410a5874b1042
font_02_sfnt_off0001052a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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