Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2bfb1912f31d75…

MALICIOUS

PDF

82.5 KB Created: 2021-09-06 22:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 77117713c9da0734e8321501a0795b6f SHA-1: 6e34296b463945ea07d16243e6a41b572586a17c SHA-256: 8c2bfb1912f31d7581dbc7ea41ff45ae5e7576e391845667271940bf2b123d5b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a link farm with numerous URLs pointing to other PDF files hosted on various websites, many of which appear to be compromised or disposable. The presence of multiple unknown PDF links suggests a campaign to distribute malicious content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/19gqai6201l30n3fkdmqp434q0/64617912312.pdf In PDF document text
    • http://thewellmanteam.com/userfiles/files/11821655162.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210902123143366.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/dusuxenofe.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8067d0027d---5638892314.pdfIn PDF document text
    • http://soupworld.de/upload/file/27986335894.pdfIn PDF document text
    • http://tms-technology.com/ckfinder/userfiles/files/62437083656.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/42317693147.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b424da80780---58257678828.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/96519784700.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/11853980451.pdfIn PDF document text
    • https://binhvi.com/upload/files/64359004264.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/pufuwinudozuzarunolem.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/saduguxizirofeku.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a26f2a93bdb---ganimiboxozaliba.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/314ddfb25b609f2c68d4c033a9bfaa44/todusodigojig.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/95884146310.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16132ab7a0e451---luxalibosipuzide.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/subipebavaj.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/zuzikodivenunel.pdfIn PDF document text
    • http://fini.hu/userfiles/file/98590173496.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2aa7ca11c---talinezubuzali.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba011cc3d9---likajavituzumidatetuzoxa.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607644224ae63---fomerokuboga.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/e7ec4dceeec15d85a991541a7da72dfa/pefipazukesavopul.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/0c1478002499178d56b917babf5f91ef/lotovimosopapudokukud.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/36149752283.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=storage+classes+in+c%2B%2B+pdfPDF 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_off0000db10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB10 10868 bytes
SHA-256: 2698a1bac276b846521953db906a3432784e4bb7b04c1569a824ee8b8294e1f6
font_01_sfnt_off0000f402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF402 18508 bytes
SHA-256: 52b624f4dfad8bd72b5565c35465f1f84390e170787a97aeb5297e0aee9445ff
font_02_sfnt_off000123f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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