Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d91252e708ab49…

MALICIOUS

PDF

91.2 KB Created: 2021-07-26 18:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: e1c11bace8479479004e3c0abeb8adaa SHA-1: 45972ea5885f60ff67e649423d406563f3039ec3 SHA-256: 70d91252e708ab496127dcbf3bb7910c619d33686e105a5580961fe365f23aeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to potentially compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/5f196744d105244de244d89ec634cfdf/61801541342.pdf In PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160852ffb1ca93---20032787899.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/84912537157.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/visar.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210607105124604.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ecaaf7c8c74---ganepuxakosodovoxexizaz.pdfIn PDF document text
    • https://khanikango.in/file/4191132308.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc80117b1a---fuvuvemosavez.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/pavulon.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd4de8ecdd---fegeri.pdfIn PDF document text
    • http://www.hmcpacking.com/uploads/files/titakejavinemunob.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/22711865821.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/fae913a6e92c736e1bbdae3c2db257b5/lirifavibosovekuporimoje.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdeea8cec0---puxizasoted.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/52b0a92c59f7019e214291aa29d7c713/xemefakusifarajo.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982a960c4fd---piguxonadasepat.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/betujazir.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe084b1d09---kusewim.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/jorepileluwim.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/idmrd89p3r65de1hj9udna0kg6/judubizasefebobobotu.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22913e0d6a---9674455728.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a785a9769bf---27460633297.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/kokigagow.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8f97a4e8b---karedunosudevemo.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c71eed455---93221823632.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/5457143221.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+file+a+police+report+online+for+lost+propertyPDF 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_off0001019a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019A 16652 bytes
SHA-256: f4e3381c557c0eca38b73ed9634d025063601026898b62c20b321605a61bb1a5
font_01_sfnt_off00012d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1C 10664 bytes
SHA-256: 9c1a413b3d7df5e9f7aa4455c6261219b6a5abf9482ab878379b8dc8573fb438
font_02_sfnt_off000145b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1