Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c14f4f4cc3246c5…

MALICIOUS

PDF

86.9 KB Created: 2021-07-13 15:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 30f7ebe074d68d657d88791b8434d024 SHA-1: 964dbb7157ab0f2383d712ffbb65449f9f84bebd SHA-256: 7c14f4f4cc3246c51642e6b29d6f14213e1c66adbc76063e0835a2e91c46cd8e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95', and ML classifiers also flagged it as malicious. The primary attack pattern involves luring users through a malicious attachment to these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c33293408c1---75138029777.pdf In PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/12b30d4219f25d0b461e65f773d09de9/94133904724.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/zebunaredunijujapem.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/ea0fbdfeb2a192f463186f5dcd3542da/81031784865.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/25609814658.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1d350a102---64604183320.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4315416fb---71206377340.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/latokifujiketamedufipozek.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/000e35910dbb4a14a91c1c1ce9e5806b/kuzimafagodeduzotelaz.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796e805fabb---jafizamovewe.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/45406057877.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/xedogiker.pdfIn PDF document text
    • http://beiks.info/public/file/94757526259.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a01c057a54f---fofafu.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/39335075979.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/sesobajipafegedij.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///23589636570.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/6a47ad78a0a17d1b96ec0f16d7ed8c34/sovalufopivisorigif.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/44941721320.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/44021826411.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/sudulidiw.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/c3a16d7851dfd0103a26460218145d92/bataro.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/jetibaxenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+public+charge+ground+of+inadmissibilityPDF 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_off0000f169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF169 16336 bytes
SHA-256: 756daf6c4621668c8a44afb111d3a4d73104f8a1b05384b800a1f92f635cd88c
font_01_sfnt_off00011c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13422 11384 bytes
SHA-256: a5c22ae35daa5a1491d173ec32fa047b3c6e2464eaff107cbcee83cfe2501284