Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd79cb705b5c74b…

MALICIOUS

PDF

83.5 KB Created: 2021-09-17 17:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 38bf43821d62215502f7ddb51449810e SHA-1: 8a586355967825f4523477902d8ac01d1b156cc4 SHA-256: 1fd79cb705b5c74bf79e355c56d901c43e0ed5dfcda70060cc799faf4d3fd7b3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs pointing to disposable hosting, indicative of a link farm designed to trick users into downloading files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://synerhu.ru/uplcv?utm_term=razia+sultan+movie+watch+online PDF link annotation
    • https://handinhand-daycare.com/ckfinder/userfiles/files/sajalokoketutebonixifov.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/95414400353.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/peborozezenubavu.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/mumirifulotizudefomego.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/nidedepozefone.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/xabutetokebivexokatujopo.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/ralokifomenulelu.pdfIn PDF document text
    • http://bronia.org/userfiles/file/88168798193.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/16054590502.pdfIn PDF document text
    • https://termoformat.md/img/files/tuxogujivuja.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/debisezu.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/17586994378.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/93309701337.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/sasifab.pdfIn PDF document text
    • https://pqclass.kr/imgs/file/midaxunopepugobixuxasowom.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/muragodavasamir.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/wugobefaziwepixas.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/xuzebametilufe.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/tilitibebif.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/sovawowolow.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/78020539921.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/sozizurojabumimoti.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/81321168650.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_off0000e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 18148 bytes
SHA-256: 67f00a4bcdebb92c3abc6bb4fede8ca2dd846667bf4d17d093414639efbe827b
font_01_sfnt_off00010fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB7 10752 bytes
SHA-256: 75abb3f5d6647581afd616b1265816b0a87d41c5bc3ba0a0147b13cf4a84b01b
font_02_sfnt_off0001286c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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