Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2ef86460671791…

MALICIOUS

PDF

82.9 KB Created: 2021-09-18 08:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7da94ce08ad019c968229695bad6c407 SHA-1: dddedde1a9de1541f05beee7809f022b7ecab4d1 SHA-256: 2d2ef86460671791f921e8354d1ca82da664ed60550f0d8026d2a8159325e236
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL directing users to download APK files, suggesting a lure for mobile malware. The PDF structure and embedded links indicate a phishing attempt to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://drafthe.ru/uplcv?utm_term=ads+apk+download PDF link annotation
    • http://debten.net/UserFiles/File/tofuwutufekasezuj.pdfIn PDF document text
    • https://austarpharma.austarchina.com/upload/files/saresumo.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109160805161260.pdfIn PDF document text
    • http://spokoino.ru/i/upload/files/88973864168.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/93228031797.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/gukipa.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/butekimidipaxu.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/xurenexabafar.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/68622873567.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/f35f62cb1c962d79c2e3dc4fce3caa3e/80177163116.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/12756453981.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/96657856125.pdfIn PDF document text
    • http://hospitalityroyal.com/upload_files/file/logezukinutaj.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210914_115403.pdfIn PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/tajufesedasenudivoluda.pdfIn PDF document text
    • http://test-immo.com/file/45806960667.pdfIn PDF document text
    • http://gibisch.com/files/files/zifotijogoxukenepupizaki.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/42188282351.pdfIn PDF document text
    • http://immsac.pe/sgi_userfiles/userfiles/files/18739529490.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/pererilewuwi.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/92352138447.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109021658101834.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/30574765188.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/zuvosa.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136432903d3e---gemubozusovo.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/jididetuvuwufijago.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_off0000df28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF28 18336 bytes
SHA-256: 60cc25fe90326756c64c0248d336b6c08f68ffbdc0d29b15538a6a65500da6a9
font_01_sfnt_off00010eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEA 10124 bytes
SHA-256: 5cff2de55af56ce3030e63a231b6df77dc49745d9c5fe00f31225908ff3cdcc9
font_02_sfnt_off000125ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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