Malicious PDF — malware analysis report

Static analysis result for SHA-256 4949db815ebf7496…

MALICIOUS

PDF

84.0 KB Created: 2021-09-17 00:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f41b5701ab0bc1d2fba523221cd2ea1b SHA-1: 304d01e805d69995b5731e8b973c988cc3fc2557 SHA-256: 4949db815ebf749621cad63a8a974f40cc3cfd1944ca38d110251cdb2293dc94
166 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it impersonates Netflix and contains numerous links, many pointing to disposable domains, designed to lure users into clicking a malicious URL. The ML classifier strongly supports the malicious verdict, identifying it as a credential phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=8+ball+pool+hack+mod+apk+unlimited+coins.
  • 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://aelma.com/sites/default/userfiles/file/96358158382.pdf In PDF document text
    • http://saconsultancy.com/userfiles/file/letawigufanipodalarimorev.pdfIn PDF document text
    • http://cocoal.com/uploads/file/dakipe.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/50920934438.pdfIn PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/jososoxe.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/valomaziputeba.pdfIn PDF document text
    • https://rm-parketi.si/uploads/63866249114.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/pufuvobapogoxijowavexe.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/vivinakodafafedu.pdfIn PDF document text
    • http://honghuibio.com/d/files/xakukedorus.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/lokiwirosasaz.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/90699632498.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/ec6216297bb5d8d355654060b785aaec/49781982478.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614201e772f26---rafexepiwuredadilon.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/31541729084.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/7648726824.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/dugot.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/xokilowajuxi.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/pibunulum.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/24625431104.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/lomaz.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/zipinesedagisoxunudisetoz.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/nepifojazin.pdfIn PDF document text
    • http://ailizia.com/userfiles/72453833059.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=8+ball+pool+hack+mod+apk+unlimited+coinsPDF 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_off0000e13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13C 11120 bytes
SHA-256: 92d5021664eeb5e2e251c401bce729bc8c9588952e4f6334707153d0925fa766
font_01_sfnt_off0000fac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DA 18452 bytes
SHA-256: 137dabea8d12b19a10f2d162836152c9a47d6c489f396e58bab2f8a4b6909201