Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f06155f7b6c5ea0…

MALICIOUS

PDF

86.9 KB Created: 2021-07-19 21:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8ca5e030279c8ff0bdf0af1340c09589 SHA-1: 3f50accd612518aa4e28bd56e4695583ab93f7f0 SHA-256: 9f06155f7b6c5ea04f87d036fd5038fcca45e62bf157a8aa11e3d57c5c39447b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories hosting other PDF files. This suggests a link farm designed to redirect users to malicious content, likely for phishing or further malware delivery.

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://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160beb8f8da3aa---26646294542.pdf In PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5bc2081aef---6912258217.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/9676618e5e555cedc4056fb5c005ffe2/18574705915.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e82e1b54bf---xaxoxureborij.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ang3aknrvepk2u4jmvt0fn2aql/39050909325.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/e2c3cfe315e7abf0bd644bd93126aa86/lodevodafesifenerul.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881e90f08e5---budoluxa.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/3abb765ab93dc50ef3a2b134f300c801/guxafaxenoliloves.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/4g5p3f71f7qlhotpt673h4bupa/maguvuwikekasiv.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/37205735815.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/c9b5f6c8a7ac67dc5d147a7167cda84e/kivak.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/logobevumenonozaki.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/9b7ab616b43f71349a821d16d305f941/88819301926.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-6-20/20210620084515616042.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/lubogeri.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aab9f77bec8---tepugopigirolix.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081a53a50113---futalaxatununawebitif.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/mekadudurujixetulo.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/48416731902.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/86469037936.pdfIn PDF document text
    • http://truthtube.com/UserFiles/file/koxudi.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/punakabumazavamufumusasam.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/pinigowazatu.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2gs06kse6e0je13dhlju2n4pq7/toxagejulogakafaloxaxige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=7+styles+of+lightsaber+combatPDF 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_off0000f006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF006 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001081d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081D 10888 bytes
SHA-256: 088d723380d5a632db697ac7fc1cdcac0991c735b1c67257c344bcd6f508ba1e
font_02_sfnt_off00012166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12166 17432 bytes
SHA-256: 8ef8174e912a06623783138d3cbf5f4aefcd15454def4126015612eefb9411b7