Malicious PDF — malware analysis report

Static analysis result for SHA-256 36bb1657820b19d9…

MALICIOUS

PDF

109.7 KB Created: 2021-06-27 23:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 094d3aaf8581697565e8545eecb66223 SHA-1: 47da1ce89ebe8a3c85a18ed5fee70f7d220005dd SHA-256: 36bb1657820b19d9b834bd33585f592249f4af1b07344fabcec440f9915a012b
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. Several heuristics point to the PDF being part of a link farm hosted on compromised CMS uploads, suggesting a phishing or malware distribution scheme. The embedded URLs, while some are marked benign, are part of a larger pattern of hosting malicious content on seemingly legitimate but compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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 http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/29580a349ae7df9aead6ede822f5ec25/pavevorezisonojev.pdf In PDF document text
    • http://archerelectricsupply.com/userfiles/file/nujakorukas.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/rudisaniz.pdfIn PDF document text
    • https://minegociomiweb.com/userfiles/file/motofadipip.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087f407b8058---79588520810.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9a6324b4---zobitopipivovitidixif.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3761f9b040b3ea12251f2353d757f5cf/88740002278.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3d31823a8---45666629337.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/4hi9o29cpptehe22a93un28s10/21855788769.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096c7a87aaef---71238788612.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/4413546949.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/82701b1bbe0493096394241cb3a34915/79812644848.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f133beb281---zofitofigutefurapetidavu.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/4999d7373e0c49291ecfce3d4705a551/gesoguzus.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/vuresaretadozujisaditij.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c437e4cf752---kezeniwenigewusul.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a131247a7d0---losiwubegujodawojokazobi.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/kivanuxosorigufusi.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/53741435504.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb24f4d2f9---42952157572.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f0896c4f389c908749db56411513b57c/56911290431.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=difference+between+paternal+and+maternalPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001276b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276B 19280 bytes
SHA-256: 043525879d2206f81e58accf4662b508d3acf0856734c28349d6ce49168814cd
font_01_sfnt_off0001589e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1589E 10720 bytes
SHA-256: f49bb93db07a7208f7d9762c7e7150af75be856057ee8c23bd9828c73af0e148
font_02_sfnt_off00017106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17106 9748 bytes
SHA-256: 5f585b20c80a06ca10460f455d7d6bf3a4dbb20397b4472c4dad232abf994d04
font_03_sfnt_off000190b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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