Malicious PDF — malware analysis report

Static analysis result for SHA-256 417c1cef4ed80e47…

MALICIOUS

PDF

89.4 KB Created: 2021-06-26 02:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f4d03855f7af04484a065c886bbb85ab SHA-1: 609326c23b9f6e2a36a9bac9ceadb92e30f6a199 SHA-256: 417c1cef4ed80e47c5375232133844ea9bca5edaa53e8824519df17c19496559
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links on potentially compromised infrastructure suggests a link farm designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/65bb6ddfa57d02ffe51f5c5e09e21f9f/kafutavex.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/0545fb71c0d6e375a6a354b66cb99434/92873685860.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b27db2016a---52075441392.pdf
    • http://ajivikafinance.com/userfiles/file/65292348546.pdf
    • http://hrudolf.com/userfiles/gobufatobimon.pdf
    • http://svsteinfurth.de/radsportfiles/file/92088345345.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c530e1778d2---xewenabela.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077af12ac285---viwudululiza.pdf
    • https://stalbeckers.nl/userfiles/image/file/zuxajotatawikanofedaton.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/cd20dce0e8fdf405f2d74aeccac83f71/lapudukosajerefuban.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/02b7c44a75099e2c415b62a72ba8eb18/tupemorovujituxowu.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714dd913df7---ruzoxux.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/515934835815cdf1a22a8d37e7f22ec6/bazekabidagewa.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/471e8ce5b0a7e1c48c2a106901adf49d/doduvawogufudafegefizusa.pdf
    • https://nenanhduong.vn/Upload/files/14201552027.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3cae17844---88669123244.pdf
    • http://pitneyclan.com/clients/c/c7/c7afcfad87c307b096642b2e35f52d25/File/fimegusarumarizefigow.pdf
    • http://sweetbasketsbyjackie.com/clients/864293/File/komuvowetasedumof.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860ce458712---90913413282.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/aeec98c01273d5c261f8880112890144/liwobapujedexudemitunoza.pdf
    • https://bhsbeacon.com/FCKeditor/file/54653723432.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/32v1029hap3s0s83727p5e3er0/misiwodeziwe.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a513d80b0---17951884522.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/03ea37be8e38db1ad9a577f8e7767903/webebewovugera.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf2fddb6bc---41938262363.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=itching+on+left+side+of+body
    • https://medlineplus.gov/itching.html
    • 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_off0000fba8.bin
fcd4c2ce89ff886db36fc4d793baeabffeab220a97d784b9290b2d0a3b4f8a0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA8 10696 bytes
font_01_sfnt_off000113ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x113EA 16792 bytes
font_02_sfnt_off00012bfc.bin
b26afa766bca327ac984dfc0ecc6fe9de94b5bd8f20cd876f92dd9499c6ec1f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFC 16924 bytes