Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcefaf84a00a94d5…

MALICIOUS

PDF

92.4 KB Created: 2021-07-02 12:35:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e049c986d2fa1dde3a8643a7afdbb9e SHA-1: 9c47f84656e818974f6e869156ce58c26c0f6ddf SHA-256: bcefaf84a00a94d501e3ff51ee960a0fba4aa316371b348a95d6d7bf546ba631
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5963429c2---93839962399.pdf
    • https://cornerstonelaw.eu/userfiles//file/gegav.pdf
    • http://vimbark.sk/editor_uploads/files/gopol.pdf
    • http://mientaytourist.com/uploads/files/68388550239.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609b77f203244---85813787435.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/ae2d837f9e727ed027684653caf6a921/7112445612.pdf
    • http://fence-alarm.com/userfiles/files/70347860550.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607207c80c05a---39553767680.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/1e5c556428d5fae5cf72021344c361a8/44103259259.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dbfbc6b9e---mijezelagogajafol.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/3u2fc46gak9q9beh5fsde5md86/lurudokezawusuworowuxa.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c3f1c19c74c---tolexowunaxun.pdf
    • http://intertexmedical.com/userfiles/files/fufatinad.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609606546a9b5---99975719518.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a00f46a9d3---37147658537.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/m5ebdlm60d8vcjidbsoch55632/vuvur.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/b46c98f06c0574e2ae4c9ee00528060d/lememufibesi.pdf
    • http://jrpst.pl/userfiles/file/madelejadarumoratevupofo.pdf
    • http://www.tekkoo.net/images/library/File/24461095185.pdf
    • http://alphasigmaoverseas.com/userfiles/file/64667887623.pdf
    • https://cgeminfos.ma/upload/file/83778072903.pdf
    • https://actorconseil.com/files/file/binaxuf.pdf
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/nejosanasafiriku.pdf
    • https://norservis.com/files/files/41334305255.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/0d4780f6f5455a8dbf2d7acc3e71525c/62129505093.pdf
    • https://syntellect.ru/Repository/file/zututedosatugopufoke.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=gene+clark+so+you+say+you+lost+your+baby
    • 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_off00010688.bin
9bd58b6a4d9326a225f8522b1af671c92afce6f5b46544a0d19767a1c3d1d704
pdf-font-stream PDF embedded font (sfnt) at offset 0x10688 17280 bytes
font_01_sfnt_off00013380.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13380 16792 bytes
font_02_sfnt_off00014b97.bin
37282607ad7e2919e033d34a86eafd0375ba31a9e1e78f730acd600068c71792
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B97 10616 bytes