Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e54c15913e93785…

MALICIOUS

PDF

85.5 KB Created: 2021-07-24 08:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ad1d66b344c9c4e17b502a98dcc85092 SHA-1: d123bea0d0d218bc7b29d56bb81bc72c08f504fc SHA-256: 1e54c15913e93785a4ccccf5ea15676b2742d421e1df93e8778109790460773e
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to potentially harmful content. The presence of these links and the overall structure align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/vrj531tob1g4heat8rjspqfk9i/76618918544.pdf In PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/09a65ced390130c448422bda0b37ae0f/53847930529.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/9mgov6cn6uvmuars5g9cisbkvd/3804867155.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/9c4fe19f48ee904e8990dcefb78676a0/piruliraburososaronug.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/50162528742.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/31009692728.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/dujopetuneve.pdfIn PDF document text
    • http://mp-journal.com/media/file/mibeg.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075959ba71ff---zabemapasidagunolupipu.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/vubezipozoxabodoxuduz.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/9ef8f7189e42c06f517ef46fff159799/rapufolemos.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b593d0554b---wezawububesaxizuk.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/semasemusonumamofoniwij.pdfIn PDF document text
    • https://pabrikangka.com/contents//files/zelinabetuzumuvipatud.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/32e454084ac8b6424a80608cd73d889a/paridivimefobonuna.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/85f05f3b39b54382bec969c6c39b1358/joriwuju.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/22064497784.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/47vsooppd4k0slqo2bpt2qc2m7/55394900316.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/12816609736.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/30037856534.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/163a824f00d720a1c6919df592f6511c/taretaruludip.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b03a35047---53991473336.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d669be6136---73680865603.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/3e968710c174dc77def3c4de653d513c/97803769049.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/sozumidufajuvonufuloxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+write+a+counter+argument+paragraph+in+an+essayPDF 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_off0000e9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 16968 bytes
SHA-256: 36b8959352c75c79be5fd6ffab1051c6fbb4c44926f00cc9529e7203e04b5ea0
font_01_sfnt_off000115f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0B 11064 bytes
SHA-256: 799160116ae3ce3f704641c1306f2eb601bad4e94d6532a09adf9c22fec1ec77

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