Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaf4a34a6bd521f…

MALICIOUS

PDF

442.1 KB Created: 2021-07-06 23:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b179dd248b41bfbed7b62e02262b2d62 SHA-1: 55aba8d86e7f94a9ac2d74d2f41a237a80fb8091 SHA-256: eeaf4a34a6bd521fc04f63619d88e834888286f4b301a2250ffeea8404752b8f
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and links to external URLs, with several heuristics indicating malicious intent. Specifically, the PDF_RANDOM_URL_LINK and PDF_SEO_UTM_REDIRECTOR_LINK heuristics point to the use of redirectors and potentially malicious content hosted on compromised WordPress sites. The ML classifier and ClamAV detection further support the malicious classification, suggesting the file is a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8396

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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 http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b1dc0274801df21565497d75bbdf797c/9094625692.pdf In PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b60c513dec5---nowefijigusufiwiwerab.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/73gsd0d4i7kpva30lu7n8blhjh/wazejaxudavunadub.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a7902615262---72598742442.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/b8r2tkahuij534rq2f0ecvu1g1/94687711497.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/q3q2hpqu2hmvh93131kv8dsomq/movesigevanivirovula.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e42a854433---81932149260.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986336461e5---bifadasifixinamidaxos.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/22057b3f049a09bbf947ba65afec62c3/voviripeji.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ca75a91ac---34076152392.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/62056502858.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6c43c3786---53597584.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/g1nj4jai6pepg92njmohddjq73/12207372256.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/kosunuwe.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/kezumanirefavagot.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef57d9ec96---47741505253.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/b506cfcddcdf517259a749ab0af2ff21/fawupezopup.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/datulilafajikazimirinimed.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202106100317314775.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/lanixomuxunefefu.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/65410831090.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/jasoreja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=articulation+meaning+medicalPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000672da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672DA 19996 bytes
SHA-256: c5412fb908c69e2f7e983b1de487710d314d3c6c45b7834b43f3abde45310d4a
font_01_sfnt_off0006a795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A795 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0006bfac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFAC 10628 bytes
SHA-256: 11835ef2d9eaece2ce9cb89bd923fd293dbee65d81edb6a3396ec9fec04bc3bd

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