Malicious PDF — malware analysis report

Static analysis result for SHA-256 011ed4223e965d67…

MALICIOUS

PDF

100.4 KB Created: 2021-09-24 05:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3d61a52d17075ec5379a996b2edab48a SHA-1: 95d8607f11e2ba4c56fb6e3ac74fe274832e4848 SHA-256: 011ed4223e965d67d26b9d08d8ccaa135f9c789b41fb120cce45119fab5bdac5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The embedded URLs, despite some being marked benign, contribute to the overall pattern of directing users away from the current document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9ff891b3b1dc72ea75d3c5d574197f04/99398529931.pdf In PDF document text
    • http://cnokorea.com/userfiles/file/vunikezoxajewak.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/11b033b01c814940a7b5921ca702998d/84505734419.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/jowobujumoras.pdfIn PDF document text
    • http://grasslandtj.com/upload/files/7015151278.pdfIn PDF document text
    • https://seger.cz/userfiles/file/22150936843.pdfIn PDF document text
    • https://mjrspot.com/fckimages/file/zagikoripidofisuxebinife.pdfIn PDF document text
    • https://norservis.cz/files/files/purenabi.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/dabizalebofog.pdfIn PDF document text
    • http://cib.lin1.ca/phpsites/vertical_living/uploads/file/bovuvaga.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/53848822334.pdfIn PDF document text
    • https://baptistfriends.org/media/botesiperigaruwefawupuze.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/51352189124.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/menedovori.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/38179688677.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/jasatepedevawapugag.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/75218733864.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/59815933911.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/17512959263.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/bepofu.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/mosobakoxogemakolefa.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/191101333322.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/54862116219.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/dodewovepaxinefuwataz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=phrases+beginning+with+nPDF 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_off000124f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F8 18324 bytes
SHA-256: a3ec1087c824c4e8eaf8e88681c235b90fb8cb711cfeae3e1c795e642e4f2e46
font_01_sfnt_off00015463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15463 10448 bytes
SHA-256: 3a564f5a91d2dd9425bece74561d12c5ca7883fd6c31206e3115906bb72d2ced
font_02_sfnt_off00016c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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