Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0016128fcfe751…

MALICIOUS

PDF

87.3 KB Created: 2021-06-28 20:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2803a94b9e053a709165823ca54ed57d SHA-1: 3c4fae4c0c235214579069c68785e5175024f4b0 SHA-256: 6c0016128fcfe751598eef30c7a0aae90b2bd8743bce161df9e8a323a3e2df80
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable binary data, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/jp8483eohicum09rrn7anecb22/35311183308.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/10fb879ed6eb7a64bd80e0d9109e1804/83513779794.pdf
    • http://texmet.pl/userimages/file/83494572847.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073740c87d3f---firekemivavisis.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c597b8371---10240055011.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/i4esuhaecl015eclnpbemu8g0r/82505708556.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/edb21c7f695bbdcb427352f2d4d48a71/bosobenoxevitogaro.pdf
    • https://novahealthclinic.ca/userfiles/file/40129494786.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/6fb914bc7fe6cd11b536b69dc98e39fa/fexaxulitidijinewal.pdf
    • http://bajcsidavidfoto.com/_user/file/35635791764.pdf
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/39728362663.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/0026152039cd2c6fa4d88110ef372e84/67945128228.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608953f6aaaf7---fazulu.pdf
    • http://cohensevents.com/clients/74638/File/lejexe.pdf
    • http://cfacgroupe.com/uploads/FCK_files/file/gutivenutifiwazarigobojel.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608079f383ce0---5013480825.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/l6a78v8rb19f5dlm1jkfto8eab/rudapamazakur.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f428c9502b---warakupaxasid.pdf
    • http://bycongroup.com/UserFiles/file/5325464528.pdf
    • https://bodegoncriollo.com/userfiles/file/69041237896.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/jowobasa.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/modexebos.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0db7bc4c03---sipapapafofusonimibefude.pdf
    • http://christschoolblr.in/userfiles/file/43296292814.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=does+a+parking+ticket+go+on+my+record
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BC 16792 bytes
font_01_sfnt_off000109d3.bin
85b598bdd7c447e5516366a9bdd44e171ead6ee69eb2dc8bc4d035c6e24bbc66
pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 11020 bytes
font_02_sfnt_off0001234d.bin
bfa169966064a9d0138f87e1596883a9262c50b023b974d2bb9aabbcd64f1654
pdf-font-stream PDF embedded font (sfnt) at offset 0x1234D 17124 bytes