Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba996d2e557ea791…

MALICIOUS

PDF

76.4 KB Created: 2021-09-21 19:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 12e5753bf223103963206739e1c1112d SHA-1: 3c9f3fd2915e5f420dc297f5cc72a1a3f03c4ebc SHA-256: ba996d2e557ea7912ba283742498327d85f0d88844f22849366650dd80e658f3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://crysiq.ru/uplcv?utm_term=hill+climb+racing+2+new+car PDF link annotation
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f99245bde1---wonipalajolezazubujimogup.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/rovaxudikal.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/61238542044.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/miburakuxoxineti.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name/files/sogidaf.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/6r45a7tsrij1cnrkkavsaro0p3/11811695488.pdfIn PDF document text
    • http://naszemotyle.natura2000.pl/imgturysta/files/kuferalonajok.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/rosovisu.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/lokonogupesawur.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/kepufodizazuwepupoxubenad.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wobozumilow.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/31976090945.pdfIn PDF document text
    • https://hssanesteban.cl/files/vodewebitewufotapovajule.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/38430984100.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/20877834478.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/67413225473.pdfIn PDF document text
    • http://deforma.it/userfiles/files/87760796767.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/juxosuluxezogi.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/bimujarimawe.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/42328106723.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/dinorivesezolitadekitijen.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/77438675319.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_off0000c880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC880 16632 bytes
SHA-256: fc17d190ef9f901e9f52a7256f17a0febf54f5c8531e7fcc6c6e8fe41ad19e12
font_01_sfnt_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 10524 bytes
SHA-256: 0d9e79837ef18f171a30663c21a45026d7e44160839016a3558865371ddcffa1

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