Malicious PDF — malware analysis report

Static analysis result for SHA-256 b108dabdf665a2d7…

MALICIOUS

PDF

92.1 KB Created: 2021-07-05 23:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 824eae04595be85514333a9f8bc5f212 SHA-1: c40abb85ba0f5619ae4814717113175bd55f7e98 SHA-256: b108dabdf665a2d7cae05e867bb60ac1fa67816d7a1e0b8192b76d291639dce3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The file's structure and content suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://www.aluvascientific.com/UserFiles/file/88100306100.pdf In PDF document text
    • http://bogelaipigeon.com/upload/file/viliwesi.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16090f052c45b8---73588015125.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/b8bkdp8q8ivehtc3582pvpvu5m/63392424848.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607df9baecee5---binuposarejonin.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1e24b3e9b---vabowiroburi.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/puxuluxome.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb53b921e4---tusiduzudiwobusono.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f766f81d09---busaruzozowaxenabe.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ff1569c76---jenezenanejela.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f10497d9d---fuwagatevazezixoluzibi.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acef868a283---vuvuxow.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/70524ba231a99af654934f6a98bcf866/54546652643.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/91882719413.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/74483710459.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/33969711077.pdfIn PDF document text
    • https://humicdp.com/uploads/2021-06-30/images/files/kosiladilowekesarunaxef.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/sexazigibiwopekekebasal.pdfIn PDF document text
    • http://sushi-belovo.ru/files/34616060993.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/90965831988.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/5sd95q5f8af4b387mrkl3mviii/towamesafilude.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/94385936025.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/85549553952.pdfIn PDF document text
    • http://yilip.net/userData/board/file/50116715550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=real+hand+cut+in+lovePDF 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_off000106ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 10408 bytes
SHA-256: b6e223d2689297e2c0c4b83e250a54a874e4f136f32cdda400edb924493482b7
font_01_sfnt_off00011e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13637 17468 bytes
SHA-256: a7f5a26eae987ac41c21dc6fb1cce8b6672025854732055c9d575c054ddb2b77

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