Malicious PDF — malware analysis report

Static analysis result for SHA-256 91e0791353fb2bfa…

MALICIOUS

PDF

135.5 KB Created: 2021-07-13 23:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 106255cf5f84c303d04b6d5a79f06471 SHA-1: 018be0d78a2f885aa487c14fb23f4b0833f639e9 SHA-256: 91e0791353fb2bfa9dfbb9601313257d63a90d05a8d6344d6e753bc997c25a7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://mimpiindah1.com/contents//files/wifeda.pdf In PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ce5f72942---64796650418.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/2a80a214c199948e13979a4872cbc2e3/renupamebumap.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/17987549531.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed39474b73b---ledexilifatigila.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/49ac69ddjp3mpfh6dvhcbu6eik/madimu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/769f860c70b8bfcdeee37ff7bd2a4f27/71045446096.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/29fda3df3a7191343d101df6fa42d52a/96644255105.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078619217470---tazikavemapekufusevunubex.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cf96f4179---gezevadigaxasarujo.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/wixuwovilegesugewawi.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/85292084435.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ooid7l6cg4159buabr5nmea310/velezuxogalisolige.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/43656114360aaa4c4e43d3.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607716f07433c---61715158679.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/tunazomapefigofinis.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/fikow.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e7ae2e9d9bf---xojozamujirebu.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/fakiwaweromam.pdfIn PDF document text
    • http://chatsworth72.com/clients/5/53/532ec3c8dc0e95779814939736d4df6d/File/suwokujogixabaniwil.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/wodifabel.pdfIn PDF document text
    • http://jamessham.com/admin/usercontent/file/famalulele.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b035be8c5---vusokefuvovupujefisaruj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=isdn+in+computer+networkPDF 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_off0001b16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B16D 10696 bytes
SHA-256: c52d04b5064356c1280441271246da824185f85dd5066c68d575184f0ced1bf3
font_01_sfnt_off0001ca0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E220 17112 bytes
SHA-256: f833478a3ae703d8f6be6a606bf285630f443cf5197d8d50e1529e2189796ea0

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