Malicious PDF — malware analysis report

Static analysis result for SHA-256 068de008fe114aa2…

MALICIOUS

PDF

69.1 KB Created: 2021-09-25 06:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 166dde71345750909861bccd706326ec SHA-1: 292c3946e69d7b9f2494393d40cc8a5096ccead3 SHA-256: 068de008fe114aa20c52249f9d7c0f9f8b30960128cf8677edb1623e2f18d78b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. The document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to form a link farm, suggesting an attempt to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://imagebeaute.fr/userfiles/file/13525538038.pdf In PDF document text
    • http://wwsm-hk.com/files/file/5546643217.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/21967821624.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/8217830503.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/nilimimux.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/82888631601.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/96507204250.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/23481315966.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/bukobugujoneluvejiz.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/75179953432.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/42549127680.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/zipapagekesononeboru.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/nadik.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/72699047682.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/towenedek.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/98775174926.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/benufesitabutegutawuwemu.pdfIn PDF document text
    • http://iccarrentals.com/files/file/15210482088.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/papovufifolijolafage.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/11992775221.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/5667447081.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/8a68f7814d55d145ebebee121ac045dc/12928671036.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/sezesadiva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=gta+san+andreas+android+torrent+downloadPDF link annotation
    • http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/sifenudaxilelez.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_off0000b00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB00E 14740 bytes
SHA-256: a2d2807de2f0b0af2e4dc68b59a33fbd840a7b01909f12e1292b8fa32b0597bb
font_01_sfnt_off0000d4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 10368 bytes
SHA-256: 72aa1ec298d40e19180e21e757456b58e07d8540822999c499846f066389aacc