Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade24eee5331a07d…

MALICIOUS

PDF

73.4 KB Created: 2021-09-27 00:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 057b16ff6ebf567efb8d485cbfe34e58 SHA-1: fddd708de889a48a00b82fc1c6a19ac5485feea1 SHA-256: ade24eee5331a07dce72dbdaead6a00b852fe004ef86c72e6496d0f51b931004
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute malware or phish for credentials. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://allytemp.ru/uplcv?utm_term=how+to+make+bluetooth+tethering+faster PDF link annotation
    • https://fsreloading.com/userfiles/files/9666239749.pdfIn PDF document text
    • http://ilkconstruction.com/Images/Media/files/87040924742.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/30823145578.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/54e8ea40162ea6d7124eb69026abc1bd/kobarikovepiveganavegele.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/vipubevexapalem.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/gesipexuwavaludonore.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/xuguwaru.pdfIn PDF document text
    • https://mabuksusu.com/contents/files/nomidejeripezikutali.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b7ed88cd9---71530983042.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16146905177f98---gefibazupenopukelupuvipus.pdfIn PDF document text
    • https://gerbangkuis.com/contents/files/41303772157.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/12132063458.pdfIn PDF document text
    • http://askaudit.ru/price/47938975411.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/87484566589.pdfIn PDF document text
    • https://lomasdelaweb.com/userfiles/2008.09/file/tadewi.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/xatukajonogat.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/74863990258.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/42940448316.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/63935201289.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/2109071949595782473vwzt7.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/61152470243.pdfIn PDF document text
    • http://tubelessons.net/cms_images/file/8015840275.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/jifusalolemu.pdfIn PDF document text
    • http://cityfate.com/files/files/48380739500.pdfIn PDF document text
    • http://guide-eq.com/userfiles/file/20210921065350_g5w7j4.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/lukuduxopijup.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/11977016650.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_off0000b8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BD 17676 bytes
SHA-256: 08056dbd22e7c568ef903e869e641ebf1697e7d0980e511d8733a238ca3ae1f6
font_02_sfnt_off0000fe53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE53 11072 bytes
SHA-256: 71ac0b0f2094ffa0906dfe4862306df054ae8c9eef37fc87fbb89052e141794b

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