Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d7ba716d75a1e2…

MALICIOUS

PDF

69.9 KB Created: 2021-09-14 01:36:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8feda6ff05a9d4a268f00a3826ddb117 SHA-1: d6aee4d8e5d848e80ff201534ebb99ce59d09637 SHA-256: f5d7ba716d75a1e2ae50caf7dab643c278c71b1bcf3ba9fa1717ca37e7ead746
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and presents a callback phishing scenario, instructing the user to call a phone number to resolve a fraudulent charge or subscription issue. The document also functions as a link farm, directing users to numerous external PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://digireg.ch/upload/sovudexasu.pdf In PDF document text
    • http://envigest.cz/upload/file/gedosibakoxop.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/87040499973.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/wepolidagiji.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/1481243936.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/netebeminopemepapipomi.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/39798794572.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/dozavatusewetasimol.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/novudijamowexadijale.pdfIn PDF document text
    • http://gamax-moto.cz/data/dokumenty/22742146667.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/11071858261314bf854613.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/xekitubasamuzejuwiko.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/nezesudemaweriwapefupexef.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/dozeb.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/bifelulowovu.pdfIn PDF document text
    • http://superbarter.sk/media/file/bumutewegezudizixipelibox.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/ruwawexumabusawubikajiz.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/togeluvadite.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/tezepulepaxemolirifor.pdfIn PDF document text
    • https://truonggiangcompany.com/userfiles/file/4885936379.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/11a7cb90e987d25f8d415cc24c53e9bd/37428152475.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/36877873820.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ronibajikazelaba.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/10964851434.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=ver+tv+en+la+tablet+androidPDF link annotation
    • http://www.thaiticketmajor.com/static/imgUpload/files/23428985077.pdfIn PDF document text
    • 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_off0000b51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB51C 14388 bytes
SHA-256: 795a1ac361f79c66cd2bef65b482089b01489fb0e8f036de6e467f0b88571fd7
font_01_sfnt_off0000d8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 10248 bytes
SHA-256: f0093dabcf353b2ba21842d660a8fa032dba1625c307dcea06c42ef76a678f6e

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