Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5168cd6ecd5be2…

MALICIOUS

PDF

76.9 KB Created: 2021-09-07 19:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d272d25afde8a010817a3da7c6be8149 SHA-1: 95673d908f2e525becf2627df02a4d58710e09b5 SHA-256: 7d5168cd6ecd5be200a19b4abe76b37f32d7e2b3a8397cb0f4a49ff1113ef9f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://garglob.ru/uplcv?utm_term=ap+welfare+schemes+in+telugu+pdf PDF link annotation
    • http://joltiy.ru/uploads/files/14428531578.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c78fd4b47---90773381519.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/dipabewepuletatulowow.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/31b86e85569d071d5c24bad80627bca1/rafugokifevo.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f83582220f0---xevelukakofejemeboxifad.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/kovilarivivotenoporijed.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/48702845562.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/zikuduj.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/97547240377.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/nerepena.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/wagorelusonorogigosivipu.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/tepokaloneweroz.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/72108415347.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/b776ee89ae5595e59e295691e278f144/7562989386.pdfIn PDF document text
    • https://irantruck.ir/data/file/96974817318.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608618fc40c22---dukeseparulu.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///gedapumos.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c31a51844d---figejawafe.pdfIn PDF document text
    • https://ka-base.no/images_students/files/25629420222.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7d3dec1c4---naluramunawapejoj.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/zarobijuzo.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086aacd624c1---51206249609.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/revabasilujev.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/d3bfeabc33eb5ce86ba3a4f4206e8968/padodozizetamij.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/83c0b88c23cb4e4cec8e42eae55f492a/15996976363.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_off0000c70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF25 11116 bytes
SHA-256: e01c9ed30c6acd982eb6b16a45a1d02b184236280cb45227a74916c92319bab7
font_02_sfnt_off0000f8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C7 17552 bytes
SHA-256: befd41c882e90fd359f3f4dffa578b1e08c43bf13eec43e256e6c05d85bcb611

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