Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eda72a54cfd9ce8…

MALICIOUS

PDF

79.2 KB Created: 2021-08-07 13:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 15708f254eaef3bf7b10b51753b86455 SHA-1: 6d206b27f0b91d0cc7755410bee4a353cb18e865 SHA-256: 1eda72a54cfd9ce89d5738cbe51e076246595d67b89972f1e0208cd3984198a1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites or to exploit vulnerabilities. The presence of numerous external URIs, including links to compromised WordPress sites and disposable hosting, strongly suggests a link farm or phishing campaign. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=how+to+reset+keypad+for+liftmaster+garage+door+opener PDF link annotation
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11866a203a---fukovutowukavu.pdfIn PDF document text
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/89053087065.pdfIn PDF document text
    • http://skupka54.ru/upload/m/luvisuvaposuwerexubuvemot.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/h4o3qevlcmmtcuvbddvauet4n3/10514975408.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090943575f6f---45061113976.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/20884130271.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae1ad75b61---pikupugevepuriwig.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/69837484463.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/kah0itte15a61051jlb7hlh2st/34206635520.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/5686256284.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/f8464519719f2972b340a4efac58d42d/30812386482.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610d50aea2ed3---daremod.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/94okglvm8317ru3e9h24p4c7be/niforagi.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/91827813743.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/levajebuxokesisib.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98909cc7f3---moxonov.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b278aabaf---94697801522.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f798910a406---ritiperovot.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d41a576d65---revivubameje.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///fimolumavokobosesovuxe.pdfIn PDF document text
    • http://www.zaluziemalina.cz/userfiles/file/38896652080.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/jobiratupilura.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/78574590116.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711b9f20dc5---pudawaweroxilakor.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/m1rli4rhndi50qdgo5dvbgrhf3/tagusuxesuf.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077a4ffb868a---zesewavu.pdfIn PDF document text
    • 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_off0000d100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD100 11124 bytes
SHA-256: fe3341afef20c5476e3f7b8c3a2d97b6cd682a418c1385f3a44d796eeb7cfb69
font_01_sfnt_off0000ead0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E2 16056 bytes
SHA-256: b197ee8418ad4ac24fe1e8d44ecb8cae4ebcd064231e436c189fa01dad5c3333

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