Malicious PDF — malware analysis report

Static analysis result for SHA-256 58081ebfbb5a53fc…

MALICIOUS

PDF

97.2 KB Created: 2021-07-29 18:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3d27de22a466428e70356e52e7235ceb SHA-1: 683dcd8bfc4c2170e8ec24d24195c7e431a21dd2 SHA-256: 58081ebfbb5a53fcdb0548886962277a480bf8fb1819a5d163f434c2f4c2db38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm intended to redirect users. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://irlanc.ru/uplcv?utm_term=el+libro+de+abramelin+completo+pdf PDF link annotation
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a49bb4c1c7---nixisin.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3039d0b0a---fivenobasatov.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/17313291216.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/9bfb713eacd379e1642036b6d7a3daf5/jadubemoname.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/2e1ndmf7gegjcm34vu56ofv6r5/dutexad.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071740377f44---zipawawakoluwobejizilupa.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/pogozane.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/pagama.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/4d211dd5d6f24deaf746f0d91f86b192/pumememipunuvapos.pdfIn PDF document text
    • http://minhphucvietnam.com/uploads/userfiles/file/18179034859.pdfIn PDF document text
    • https://infotechbg.eu/file/dobikivi.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f0afb2ffb---78666183680.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160846f48c29f6---75671340258.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/5j03u74tqhlh2q1afv5ljisg71/61129384026.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a02c912c75---49676255044.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/82007238819.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/aeafb511b62312eeb6a844a7fb7d0c23/52447035744.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/43818919715.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ed1ec823cff---pidupetabon.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0323fb3a9b---kigaboxig.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae36c1885---76332590517.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/96710776619.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/voqd67iul7ids5f2us66b7fb32/tirurenaferarukuk.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/wozasosusulo.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/5737386e86d0300a37c3c292307c5a38/85994949458.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC5 18472 bytes
SHA-256: 5e247b829f3394c77ac0bc60a8cec3cf62721f2a963bad7f27f00e4a8cb952f5
font_01_sfnt_off000129c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C4 10736 bytes
SHA-256: 4d08d3e66adbb121f5fd38d5cb943713785d5d33430da14405cecf92c7ac2904
font_02_sfnt_off00014218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14218 17596 bytes
SHA-256: 71d69008c1af709b39cb19ff26598b1a3c4087f157c7dd372c62c2e2930c850d
font_03_sfnt_off00015d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.