Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf64ff17563f1754…

MALICIOUS

PDF

84.6 KB Created: 2021-07-26 10:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4031e4478e70fe1a6a4e039984aeb0d0 SHA-1: 657ca00b6d788331dcd2c5fac03756358f78e74b SHA-256: bf64ff17563f1754f1040c2d302a1949d2421c30bc60c8ba687273f2c858f482
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, characteristic of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the heuristic firings are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/mdvvbldo2bde7vgsj0esidtu0m/57339178447.pdf In PDF document text
    • http://www.kingsmen-cmti.com/upload/files/55261755119.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2dd0353ea---zivasegawoxijogagevumajig.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/97407642407.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd7c74ebb7---28314515628.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/59245952485.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4b76a24cc---14943704905.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/c7ggoisls2dcqs8lekpdmp4798/gefolir.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/357250133e0429b263d1ff36249e62fe/28079049375.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/rorodepuri.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/17886a11c588a536a4442709a5d3456e/kozowusavopogunivez.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/bc1b267629e4b0b80ea571ef2a9d660d/13587739647.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d57c01282ee---40862877982.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097969ccfd55---46124328951.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/zosez.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/kusegi.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/cce80412b252adc9d8b6d9d2c000abee/93261294684.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/63566241255.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725d422892e---zafikatarizifalavefuxolal.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710f7ec7ff4---jokabotoze.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16077329f8d376---seduwuzitefagabaxurikupu.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/641a802893394e796e1b1031212a21a3/92930849923.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/f6a9696888a75ff6f71e5a0fc2841137/47441020123.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+recertify+for+food+stamps+online+in+nycPDF 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_off0000e836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 16536 bytes
SHA-256: 198062e73dfbdc03af6be3d1bc4246d13b00188ebf0a46f35c49fe104fa01ac1
font_01_sfnt_off00011356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11356 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6D 10972 bytes
SHA-256: 5e4977e1a7c08b015ae18eebad30875ff01c0bb991730f3b0c07342442fb48f7

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