Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe651ee972ca7e1…

MALICIOUS

PDF

77.7 KB Created: 2021-09-21 18:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a8a23e742a3dd1f52f487e6a46b842e9 SHA-1: 17f000956f38bb1b893f4aeae2fbdf23e658ef42 SHA-256: abe651ee972ca7e13117dca197b623dfef4ea914e3ff6ef150fde8b67d998810
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of numerous embedded URLs, many pointing to disposable domains, and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong attempt to redirect users to malicious sites. The 'SE_QR_LURE' heuristic suggests a QR code might be used to facilitate this redirection, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://galettedesrois.eu/userfiles/file/72037805580.pdf In PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/78326797311.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/zenalusikadimobof.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/45612523747.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/nujifuz.pdfIn PDF document text
    • http://uco-kampen.com/media/files/9670012760.pdfIn PDF document text
    • https://musluogluotomotiv.com/upload/ckfinder/files/mosurakulidewi.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/forosut.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/63263727008.pdfIn PDF document text
    • https://sindhuinvestment.com/ckfinder/userfiles/files/bujukamivuzofufufegumodo.pdfIn PDF document text
    • https://mackbeks.com/files/file/68824301611.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/kajuletujitel.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/46369941045.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/kujovap.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/425a8e452fd3335d3aa97d7cebb36097/20513639817.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/62502838838.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/todifinem.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/3p9ta0kel36v0uhkpi5f17qno5/85761341059.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/nupalojunosus.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/44427735190.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/61585344213.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/roselarumoraloguga.pdfIn PDF document text
    • http://ranfeng.com/userfiles/file/2021-9///202195217567853.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210911153516.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/84455667800.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=alt+casino+apkPDF 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_off0000c6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE5 19856 bytes
SHA-256: 3d33e7c72aa6ba481c517435aa4e6f2615cb4992752acc7083ee544df99ed4b2
font_02_sfnt_off0001128a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128A 10208 bytes
SHA-256: 11e49ea9b6da93e1b34065dc069b7a5580b2ba760dde9c230bde7b30ca6c748e