Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c7f2cc90797c17…

MALICIOUS

PDF

78.4 KB Created: 2021-09-10 13:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 410d9c6bbde9b6743e3f78861dcc833e SHA-1: 8a28a7af4a4bcd3cce6877c67be18694f2bc0052 SHA-256: e0c7f2cc90797c1798c21f0e2631aaff3671dd5fc830f6c007e3c5071b7ac0cb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs, despite some being marked benign, contribute to the overall suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://evolutionchonburi.com/userfiles/files/5827773961.pdf In PDF document text
    • http://studiolorenzino.eu/userfiles/files/katuwatobidekozutugivajum.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/45607900528.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/51896582436.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/23954370365.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/35397774592.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/gakepodejagemati.pdfIn PDF document text
    • http://speckrepej.com/upload/file/35831621672.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210907_001751_137.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/82325795488.pdfIn PDF document text
    • https://nikolsbeauty.com/webroot/f/uploads/file/33081098078.pdfIn PDF document text
    • http://uteambio.com/upload/files/wirodisaliwumidubaxivare.pdfIn PDF document text
    • https://emenu.hu/editor_up/12196378066.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///60032543360.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/7929208820.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/70984015396.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613681a350b0a---64152325896.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/71286833079.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/60715504291.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613b15e50f6a9---15897928880.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/puwubekosuwatowoxurided.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/lesajogejidakasepesare.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/27743608512.pdfIn PDF document text
    • http://merwepizza.com/upload/file/tadatilixaxipomujeseji.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/zumomabozuxeduko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=modern+family+season+8+putlockerPDF 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_off0000cb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1E 17904 bytes
SHA-256: a0d50a0d5acbc193dc2792feb4396d9c8fdf0a2998c4e0c41fb2c5c437497292
font_01_sfnt_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 11288 bytes
SHA-256: e47de592d35e1d32c5afe8af32cf4cdff3e77a1ea2409887c79902850d6a677e
font_02_sfnt_off000113d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1