Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe644e94a2e1c9b…

MALICIOUS

PDF

75.2 KB Created: 2021-09-15 22:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f56addc2eb10405e35fb4233503fed01 SHA-1: 6e02cfa0a1dbba1eae5cd35b9659e71a133c95d2 SHA-256: abe644e94a2e1c9b2562ec2037a68bd975301c8a5b7fd17d19977284e248ce14
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://huntic.ru/uplcv?utm_term=online+video+to+mp3+converter+free+download+full+version PDF link annotation
    • http://bestorkate.com/uploads/ckeditor/files/98641701238.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/43202943657.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/datureruzugol.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/dafoxi.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/zuvosupagorozirerusu.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/52670414339.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/36321655101.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/padiwalefiwofi.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/mubijex.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/28733369696.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/34744925541.pdfIn PDF document text
    • https://digitaluzaktanegitim.com/calisma2/files/uploads/41615898700.pdfIn PDF document text
    • http://nikolabartakova.cz/files/file/57585766454.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/xusukogepewe.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/74033788423.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/gelulawi.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/83730801017.pdfIn PDF document text
    • http://snft.ro/media/file/fixotizenobili.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/jumizabivakuj.pdfIn PDF document text
    • https://luckyfood.itweald.com/uploads/files/6141ffde4dc1d.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/16870149868.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/81254697004.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/82877087234.pdfIn PDF document text
    • http://caerulumpharma.com/upload/files/5902226513.pdfIn PDF document text
    • http://eksternest.be/images/file/84113092629.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/78497858301.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_off0000c252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC252 11228 bytes
SHA-256: 2acda5fd0bcc62708decebe1525fa04c35fd5b0cc17d3ef1ea515c7eac3fa292
font_01_sfnt_off0000dcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB5 16200 bytes
SHA-256: f912a0606cf0d3de4f67b3d619acee8a2d25c6fc237338231ccdf343976cbd2f
font_02_sfnt_off00010660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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