Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc9bc2b9c89e1a5…

MALICIOUS

PDF

80.7 KB Created: 2021-09-16 06:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3db6837a648a8a7e7659fb3138a08838 SHA-1: c97e6b74912cdbff4201c3da4b6b54e0ddad64dd SHA-256: 2cc9bc2b9c89e1a5c4d3556749557ea88b38c6a4f09b4893db0091223a39c589
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or link-farming operation. The PDF structure and embedded content, though obfuscated, are consistent with exploitation techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=how+to+use+ha+tunnel+plus PDF link annotation
    • http://tecs4.com/intranet/ckfinder/userfiles/files/11536689570.pdfIn PDF document text
    • https://timminsrenovations.ca/file/tgUIyq9AK0iHUZKi.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/besajudasumonef.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/b8a543810615d7df0bdb63e4b1ceadcc/39145649520.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/tafekabogutone.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/nadapego.pdfIn PDF document text
    • https://expobar.vn/app/webroot/files/images/pages/files/63457483923.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/21936323997.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/vunibonesapafolinewojep.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/34267702496.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/82999571429.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/moregupidorut.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/67931057849.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/24436232678.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/warajoze.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/nupodabeve.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328f3a35f15---nevebotobizavuruwes.pdfIn PDF document text
    • http://zenkatsu.dk/files/tefixapasagunolex.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/28013694096.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/tizula.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/32964104174.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///66314246095.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/fipenizuxubomuninifi.pdfIn PDF document text
    • http://www.sealjet.mn/pictures/files/gixurofuwumal.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/sukeresosa.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_off0000db6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 16440 bytes
SHA-256: 6208eb328a21feea5c1d1ffeb2f3901c83d3ccd9a0f953c2966bafd7cbb53af5
font_02_sfnt_off00011e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1F 10336 bytes
SHA-256: 89049538b64bb7c40230b4cf0445039e4ff72eab845cbcec7575ec405a40f38e