Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6182f58ff6fa1d…

MALICIOUS

PDF

82.8 KB Created: 2021-09-14 11:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 16217033c1b0ffa661afc77b51fab377 SHA-1: 64f76c603080144c3f5aec09ddcb9f93034bddc1 SHA-256: ee6182f58ff6fa1d72e1ff99fac9de169fb5e2026ac3f8008f795a8123ddf8c8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various PDF files hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of external URIs and the link farm structure are indicative of a spearphishing attachment attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://catamma.ru/uplcv?utm_term=music+video+maker+apk PDF link annotation
    • http://skkouty.cz/ckfinder/userfiles/files/segitubudobagog.pdfIn PDF document text
    • http://le383.com/uploads/files/refafokoxasufatotidelevuz.pdfIn PDF document text
    • http://net-marketing.hu/images/files/47031324016.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/8969880500.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/pinujojetegitexonuto.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/97132586561.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/rapevezetevosemunel.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/rojaboka.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/deravasu.pdfIn PDF document text
    • https://h16hr15k-h19hr37urn.com/contents/files/27346802869.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/55391549245.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/19348274410.pdfIn PDF document text
    • http://qigong.ru/userfiles/file/bodezozadiwewoxure.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1630785953.pdfIn PDF document text
    • http://xtra360.net/campannas/file/ditanizukuje.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/73545836135.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/57738251680.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/kafen.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/bcac1ff240509a4118daa073de6e62ea/45711650538.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/kobamakeduviboturak.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/pesawusafunema.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/52571082408.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/6983386338.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/numij.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/vijedifekebejiw.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/pajulej.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_off0000dc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC04 18952 bytes
SHA-256: 11eb97245b0adea832a37effc8a0a475f1a2e166fdc171396b700a46f0b0e1b4
font_01_sfnt_off00010cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF1 10680 bytes
SHA-256: de5fccc50d2a07d37867ed96343852eb2a20d2bd37b6dcd2775f35ed4c6f5767
font_02_sfnt_off00012583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12583 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1