Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7960bbc96505f0…

MALICIOUS

PDF

83.8 KB Created: 2021-09-12 08:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 44f0938fd955b0005525b065fd278437 SHA-1: 3545abeb8327523e5535bf28a6752289ca97660c SHA-256: ae7960bbc96505f0a01addeafc068f5ed8a1c5da4da5aa9fc0e261e0f1ae2d6d
164 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm designed to host or redirect to malicious content, with several URLs pointing to compromised CMS uploads or disposable hosting. The presence of a 'download button' lure and a high ML classifier score further support a malicious intent to trick users into downloading a payload. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nuklearmedizin-amro.de/userfiles/file/99069006732.pdf In PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/nusolojuzixedalaxi.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/bobiwokoguguxo.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/66163696179.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/62973959135.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/29473030164.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210911235247.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/13750523224.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210911052239.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/jozirozos.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/kanimifebakedalox.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/76779839476.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/39910402804.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385d680a2fa---zujapesebeta.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/14392863222.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135492e6312b---63816101561.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/68149368512.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134da9a0b395---83624789645.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/4bcb6a61275f77fad5bb8774cf314f4b/miwumoponuruxuzonoga.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c0f085c7b---dapaneb.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130938288386---63968567889.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/jijujurenarizurif.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe0ac45a91---74446216899.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/jutidepomudorevejidigamol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ha+tunnel+lite+apk+downloadPDF 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_off0000df86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF86 19252 bytes
SHA-256: 3c789ff6af9ba2d52622e368ff5cba85dc088c5aebc537e7d4b4174d91f6d4f0
font_01_sfnt_off000111cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CB 10384 bytes
SHA-256: f7621cabf74b42b5da118c91ed83082f4e7dc6751e81850a03d6edf1d3782d2f
font_02_sfnt_off00012959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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