Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fe4b7a778d4fd5…

MALICIOUS

PDF

80.5 KB Created: 2021-09-04 18:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8dbfdb6d8d9a5765199d6887e7ca49dc SHA-1: 9dbd4e66ec5717b180653f1dcce760895756de2b SHA-256: 60fe4b7a778d4fd59a11db501c92e894ad42124aad8e5a0c1b62f778fcfd38d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, providing no direct user-facing content but reinforcing the suspicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/gc24b3obd6e450r75dco7srn68/425910382.pdf In PDF document text
    • https://tigapilar.com/upload/files/puziwufasisimifujiw.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/abd982391c62e53f4aea3a5011721af4/zativesujajulelegaminu.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611ef576f069a---29089621204.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/77422576158.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/q3p4kcjtjqsqfsnqjmltl8b1p1/tuvizomugad.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16077bab68f6bb---fuzafapeta.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/xuseviz.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/95422855397.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/lomulemudarajegamorol.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f37c2b7069---bemufekudevosek.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/56319059328.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/5199740142.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607925a5e6ef0---datubepi.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/sagawajapukukife.pdfIn PDF document text
    • http://remont-m.com/userfiles/file/sipipufawilaxibumonux.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/92844697052.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/fc21f455ee59e7bf31283bd2cfc500a4/wefodaxaked.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c55d7d877b---xibelanozokuzaxi.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/79b98af53accfde57176ae41042f6c93/5516655425.pdfIn PDF document text
    • http://poorclarescork.ie/images/60522473653.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/ad4f5ef1ed91e87269f9d63c83bee6aa/madadusepegidonoxoter.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-6/file/gexowilir.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/xibividarilewoxelezuxed.pdfIn PDF document text
    • http://icoenergia.com/userfiles/files/18427838719.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/35df7e41187e6590f5311d3839a7438b/74574154563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=geometry+surface+area+and+volume+worksheets+with+answersPDF 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_off0000d458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD458 16848 bytes
SHA-256: 349bc31f5ff87ac3c1b9f75fdf757886b141fd43ce8cc6ee14d87ec10b90d42e
font_01_sfnt_off0000ff8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A4 11240 bytes
SHA-256: 8957c084093b179b6fddc2450d6c5421e17c6b9df67f0c4c301c2960c9f11fed

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