Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e7fd66367fdc93…

MALICIOUS

PDF

85.4 KB Created: 2021-06-26 06:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9b0edb8b0a4a745309efe7fb1d9b5368 SHA-1: cc8a9855895be03c18bd0dd900f7d8e1b2fc9a17 SHA-256: c6e7fd66367fdc93b367dbbfe5f7ce4716768bd80580c81ae7dd2c2c2bc8de1b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports its malicious nature. The primary attack pattern involves directing users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://nomylo.ru/uplcv?utm_term=be+conscious+of PDF link annotation
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/1517423378.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160983037904cf---balevakax.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087b4cbe6122---18378622736.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/jugixowesuwolule.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f352f011---25083240169.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a6f9d0667---19356432037.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/m01mmjnc2n1mqo26s8ej1613oe/vujazexosaxuvopuviro.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/ce816fa90d29e361d2f638d59fc1c962/vepefagimupaloxiv.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083645aa0ecd---gomukonelifemobaroviponek.pdfIn PDF document text
    • http://artside.org/data/temp/file/16699678504.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/48049698535.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/zuwilusalube.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/d3f5966fb6b5ab8adb57424d96374f84/widosawulat.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073ec2b01bdd---24217836141.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/f92nle9if2vnevj628i1iefl4t/19274010696.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/35c0ac9d7471b001adbbf5de3fc063c4/1336209564.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/lakarutaverisa.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/n5ejh8rm9kkm3q36jffpbrh2sp/rapira.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/550ef8d9c693aaeaedd9207d4f833e72/64134153917.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cb6337224---69740376851.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160844ca286b8a---zomujinopiwixarejapiw.pdfIn PDF document text
    • http://jucal.es/images/file/puvufepatumigevuximu.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/78f7032d43c1d103f0c9068390902dd1/zavixijuzokefowe.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/t8osqunkcbuv149ftbhiq1kbk1/94082039051.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/88aldvcnhqq22j8n9e70kde4p3/wijedobakusuzanet.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/dcc68346e38a1dd2cd16a7a34e608c49/31716233024.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_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 17376 bytes
SHA-256: 4b18ba0798d89f016d0469ea1beb605c96afa2b2a0736c6742c66a0757e3e589
font_01_sfnt_off00011998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11998 10076 bytes
SHA-256: 18e46d43b335713686ea77ad010f7b258db4c9d19909a9f501192dcb109802b2
font_02_sfnt_off00013031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13031 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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