Malicious PDF — malware analysis report

Static analysis result for SHA-256 2769f51b0a62b864…

MALICIOUS

PDF

78.2 KB Created: 2021-07-17 00:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 10095a028d4573293855415364f6fdfd SHA-1: ae71464da4a7d383f9657030320f6e8dd3891b80 SHA-256: 2769f51b0a62b864326291b467f0517db10f1bf8c8a327fe6fa487da5398f894
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://eurotechcorp.vn/admin/webroot/upload/image/files/58479489491.pdf In PDF document text
    • http://hanleyresources.com/images/megalakofopekigeji.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/84750188506.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/zajumekuxusosajarowajo.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/zikalamanapivuvijubibagux.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/1637bd31782e1f61119b7474185a45da/37604824059.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/didiwibuwowof.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afe55cb99cb---wisuromofuleti.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/88759760151.pdfIn PDF document text
    • http://solac.nl/app/webroot/files/userfiles/files/23481296702.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2805cf41cb---44647677675.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/t8v11evkg22opvg28ordege10q/mulufadadalazasozelag.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/49461519360.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/31411089601.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/4a3sb5ji02vjnj3p4ou45jj3pl/89912152207.pdfIn PDF document text
    • https://songhong.info/userfiles/file/boludaref.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/80546416129.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d877913dd---62384639641.pdfIn PDF document text
    • http://soudurelausiere.ca/upload/editor/file/resuf.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a78deb213---66808393291.pdfIn PDF document text
    • http://schnauzermountainminiatures.com/clients/17729/File/94446570552.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+save+a+jpg+as+a+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA5 10604 bytes
SHA-256: c9e4c549fe512d3f199172c8458af0fe1e6d3a70cc155abe6cd12166bd7b1695
font_01_sfnt_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF1 16792 bytes
SHA-256: 617a56b768fb2f9b0afc27cfb2272dcf3e7378b61f393435e4032a75fc65f82f

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