Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efac544d6a45018…

MALICIOUS

PDF

84.3 KB Created: 2021-08-26 15:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 568d490156c0ca663a90f60b3d295ba2 SHA-1: 8ba803e726ee71655910ac3e7256201524b87668 SHA-256: 2efac544d6a45018d511bc0c623e4e5108ac83437e229ad152c81da1c9b98caa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript which is likely used to redirect the user to external URLs, as indicated by the numerous PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The presence of JavaScript actions and external URI references strongly suggests an attempt to lure the user to a compromised or malicious site, fitting the profile of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://vishalahospitality.com/ckfinder/userfiles/files/38468080314.pdf In PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/69332245331.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/fabccf4c36278b9569a34ab21302b375/tukamem.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/41577090901.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/b3c9f1dc49af5313055629a1679a6ed2/goziravurogobimisom.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/59207548572.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/10883209165.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/pexitozukomajezomenoma.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/e7240abe79841cf75517e4fef8c4272d/70010138568.pdfIn PDF document text
    • http://metapolar.hu/tmp/1423905297.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/9af2482a0801cdc426e7d14d3b8fc4ff/50166787532.pdfIn PDF document text
    • https://hgb.se/filer/file/sofodavotubekaterex.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/likivebasigudu.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/58788664421.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/nobuvula.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/zujam.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/edr5l3m6da49drnqbidqvpfpbt/bifugozo.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/fisunatakipetaderele.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a73e5e2f1c9---badimurafakuloli.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/64759540399.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/29bee1d363883ba6e5346e66aa1a45f2/8122571130.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/f711cea56bf05ca89312418f635a387d/jidexoxitugoretalaf.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/nilodazurosutagaxekudo.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/67322121078.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/deravezi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=protease+industrial+usePDF 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_off0000e84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 16736 bytes
SHA-256: 45e4ea35d3efdc6c53762b44ddf791394f406ea7517496c965eed64d335ccbfd
font_01_sfnt_off000113ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AB 10344 bytes
SHA-256: 2f3f985e0a4e859c12d5d21108739f81d17b154be5ffa50090353ae35f91d0e0
font_02_sfnt_off00012b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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