Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc21d538e8ff7551…

MALICIOUS

PDF

86.6 KB Created: 2021-09-02 19:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 230718fbab62da129c118caf3cb3371c SHA-1: cc2ce46b0ebaef0d311649b19c1df4ea3581d96d SHA-256: cc21d538e8ff75515cef1663f21094ebb62b8c9b542a31517d0ddf7cf6905dd4
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to host malicious content. The presence of urgency lures and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt. While no scripts were explicitly extracted, the overall structure and URL patterns are consistent with a PDF-based downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://garglob.ru/uplcv?utm_term=nyc+train+map+pdf PDF link annotation
    • http://bsinteriordesigner.com/userfiles/files/97183259473.pdfIn PDF document text
    • https://bamor.org/userfiles/file/senumawotepeni.pdfIn PDF document text
    • https://armandofalconi.net/userfiles/file/gesosomosexudek.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/is3b2mjncdj101ne3cclievng5/77462532537.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/51ecc8592dd1639d5de02b1340d52fb8/segunapuxi.pdfIn PDF document text
    • https://roarmysecurity.ro/mm/file/vununekalegowoniretusola.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/deabb801470217f0610f7a14aed873c3/17555091609.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077da080b78d---juvobodejelam.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210728170751_lk8rcd.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/5dirra51k8k9qesj4egjftptm1/fibagosuwelenojaxisuzo.pdfIn PDF document text
    • http://jimmartinfamilyreunion.com/clients/35696/File/27772140004.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7352786731---zumirisedadis.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/9eb302e743c64e526f4a9a4eb8ae3f14/zuxarotomesedokakajixip.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be88b5b0d7d---68312227637.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1afe982fb2---55682422704.pdfIn PDF document text
    • https://suthuytinh.com/app/webroot/uploads/files/40841734916.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ljud7ufugn5bm5gu84hs85rqeo/tumogigamir.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/94732560654.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608309cd07226---foworamagijamasejuzogo.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/xifuzosoz.pdfIn PDF document text
    • https://chp-travel.ir/data/file/53693777385.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c303eab28---jikefevowemefotikamur.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/4744460584.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/duvezufuvutewe.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/d44c48fa32ad127418854ec0926645c5/bulofitusuduxipevadel.pdfIn PDF document text
    • http://deleersnijder-bocaege.be/images/file/35214536622.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_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 18804 bytes
SHA-256: f753301664dbdd1d241065555656bd4044070f389871cedf7277afbf4a48b616
font_01_sfnt_off00011d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D35 10408 bytes
SHA-256: 08eacd0ab9d4ead60d42ec2323f02e776c8a3a8841746f7118be43852d64c564
font_02_sfnt_off000134bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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