Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5c01ab0390fa95…

MALICIOUS

PDF

82.8 KB Created: 2021-08-29 04:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 302ee7483024a8871f1feb2d3ee54d36 SHA-1: d4d9534c93118a3c5d2b9d369f3775388eb54764 SHA-256: 3f5c01ab0390fa950dcfba37bdba8ac860589d95508dcb2764267f530f1e884b
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, hosting numerous links on compromised WordPress sites, likely to facilitate phishing or malware distribution. While no scripts were extracted, the presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160df3d11baf31---99276537065.pdf In PDF document text
    • http://rymwid-training.com/userfiles/file/77640529788.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/pajobewofa.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e024ba3d3ec36c12300c8c8ef7e392a2/5053251747.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/gixupelexemolipo.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/q43vuvb4mg327bdta7l3ajh9u7/vevudonilirabusobeniku.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/tejepun.pdfIn PDF document text
    • http://dmhfamilyreunion.com/clients/4/44/44eff64e497b984d8b2945277059c9c0/File/gedeminexidokujelomu.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/luwurovomuxepiwu.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/podosanofekuf.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/mubujukogetuniw.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/semitovujenozotite.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14ec220abc---14013073345.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/1299339654612accfe6ddf2.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606f425976417---85802148971.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/92003712871.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a87136d24e3---zewaxas.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/5398245527.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/tototutodukuj.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/72032604685.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/joxuvovominud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=adopt+an+element+project+answersPDF 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_off0000db1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF336 10780 bytes
SHA-256: 1661b5877306034a569ba5f97dd11f7ff14720454f82af705b3155a09347163e
font_02_sfnt_off00010c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C22 18040 bytes
SHA-256: 787ef2700bc67858539a872a9c43bd078924080e94581c9b52073a797dd5f061

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