Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e64ce5bea7fb7ba…

MALICIOUS

PDF

82.7 KB Created: 2021-09-05 14:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: aaaaa377d05a6e6548aa64066df4900e SHA-1: fae2344c13c4d49871b837bf346bb63ad7ad6ee2 SHA-256: 2e64ce5bea7fb7ba69b4ed2d218e73ef6e28b6f1c67bfa199dec549e6b807b2c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a link farm pointing to compromised WordPress sites. The document body is unreadable, but the presence of external URIs and link farms suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/09a496f80d4478a214ded94e57716d44/xupawam.pdf In PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/nhc98p28e8ckaon91h2udtno91/68654568171.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b985c576982---kuvozifetape.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117d9bfaedab---leretetam.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071edcb9de3d---68557772738.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/s4ch8h7ps86tjijgfe70h31e7i/sefirubafavejokisavulori.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9ded24658---30804349054.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/7404166095.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/2e4c1864e9ae15904689400f774856a3/megilinexetedepi.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/jatur.pdfIn PDF document text
    • http://debten.net/UserFiles/File/5857867926.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/cfviee80jlfouvb8pfeek93cv2/buwinadij.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/13103430042.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/75368041251.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/rigorovudosukima.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/70746617606.pdfIn PDF document text
    • https://dm288.rs/slicice/file/60310981116.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/65127919858.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/i1kiqb3t8up6gh89uca0ro1l86/fubax.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/vujusalamogegivedenap.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/0617c7dbdcecce3950e1ea6e33994478/kafedupabuxodifogope.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/d6d5cc9cdf96cec9e93f228a1e98341c/wipevajokiwuruwig.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/13075944616.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16087bc79ce38d---bakid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=visit+visa+application+form+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF42 17588 bytes
SHA-256: 10ae09fea24bf5f084635c20aa14b82602330ff88f8c5c8bc51961d98ae930ec
font_01_sfnt_off00010c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9E 10684 bytes
SHA-256: d0c70734bb4fb38e0a9105c536e4e1cb3c7bcc38c7212935e073027111b0c874
font_02_sfnt_off00012520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12520 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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