Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed45d9412d40403…

MALICIOUS

PDF

69.6 KB Created: 2021-10-04 00:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: bdfc77de3bf82c3aac8ef1693a9d2c20 SHA-1: 74aa12c5c78c53df4b8a2c567610052e0a24657b SHA-256: 3ed45d9412d40403a3adbd5def38ddc339c8344b4850e31bc15ce061459fc335
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to potentially compromised or malicious domains, strongly suggests a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies the document as a link farm designed to redirect users, likely to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://distriparkbotlek.nl/userfiles/files/91192804130.pdf In PDF document text
    • https://usgcambodia.com/userfiles/file/38529018514.pdfIn PDF document text
    • http://jeykrishnaclub.com/images/file/51897209675.pdfIn PDF document text
    • https://sindhuinvestment.com/ckfinder/userfiles/files/40363242121.pdfIn PDF document text
    • https://brod-plovdiv.com/images/fawujobidesewajileta.pdfIn PDF document text
    • http://gaudi.tw/upload/files/37274595279.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/26807273970.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/65686517870.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/gamojelisuxawezuvoku.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/38386825686.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/busugegibidesinoraga.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/56397017459.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/liwevupixidekafumetodepe.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/93246994719.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/kk2nkkfol3gcvi46lk74tmcqgq/13761928541.pdfIn PDF document text
    • http://vswet.ru/f/mijomog.pdfIn PDF document text
    • http://webminmax.com/userfiles/file/boritovanedil.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/wawajaxib.pdfIn PDF document text
    • https://nistd.in/userfiles/file/48321133087.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133631db1232---nefar.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/zibamamoxasim.pdfIn PDF document text
    • https://membermimpi.com/contents/files/35786028628.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/divatubonemapenosad.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/28149353845.pdfIn PDF document text
    • https://aventuraholidays.elladatravel.ro/mm/file/18727847815.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/nulokujibob.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/vibanatefarosepinilaluz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=different+types+of+glaciersPDF 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_off0000b1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F6 14992 bytes
SHA-256: 141a6831e6960cb18de00a582a4f3af1e1457ee1b6b724cfb3c71ba700cfcd3e
font_02_sfnt_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 10768 bytes
SHA-256: 9420bc9fcb21b427215deed9680fa9ef6c6bb6baad9f18461d106ad60c7f3468