Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f225a76560a051a…

MALICIOUS

PDF

72.1 KB Created: 2021-09-20 03:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d70d2212a236f44a64fdd551baf4d8e7 SHA-1: e5f3e1d538c8422ba3ee2f8e7073f50cadc65a0c SHA-256: 1f225a76560a051a38445ae1c27775412e1dbafee034cb93ab2d3d37af8c75de
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting, indicating a link farm designed to redirect users to potentially harmful sites. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=indian+train+simulator+2019+download PDF link annotation
    • https://inprovituruguay.com/ckfinder/userfiles/files/wosuwizonegugali.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/89668309530.pdfIn PDF document text
    • http://canissapiens.com/images/uploads/file/sezokamegifiziletixuf.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///23818246514.pdfIn PDF document text
    • https://diphong.com/uploads/sefowogujoxatolomesix.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/25877181995.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/jenisinexufuzofamex.pdfIn PDF document text
    • http://htwy.com/upload/file/jomezevorexaserubepoveru.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tinasosudalorimobirafat.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/vozulon.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/69784472319.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/61457462103.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/katogegowipoxiduz.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/o05k5tlb4gnmneutmpkbnr18ef/74992878691.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/1047008535.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/4774955837.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/davuto.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/79421421221.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/mibejotumebokasobesi.pdfIn PDF document text
    • https://suacuasathcm.com/uploads/files/60896431830.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/79634897285.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/bojakikufufasarasupozevij.pdfIn PDF document text
    • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/78309945257.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613083954e94c---68693619407.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_off0000b837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB837 16120 bytes
SHA-256: 2f484364609c0e0b97391977dade1574b17768549b40a554ec0fc0180bca1d2b
font_01_sfnt_off0000e197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE197 10876 bytes
SHA-256: 42d062ed51aa2e9e76d5af5483eba2c8467cfec8d027b787b6b06fb56d9ba882
font_02_sfnt_off0000fad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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