Malicious PDF — malware analysis report

Static analysis result for SHA-256 3592bf9182d9b673…

MALICIOUS

PDF

83.1 KB Created: 2021-09-19 12:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 299130c624a6aa65e5ca9467f1f7089b SHA-1: 8e40549eead69c664ea2b986bc1a01550974761d SHA-256: 3592bf9182d9b6730d7fe685a7dbbacf62140ceed13065c155e65335d38cf797
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to potentially disposable domains, indicating a phishing or malicious redirection attempt. The presence of embedded JavaScript (T1059.007) is a strong indicator of malicious intent, likely to facilitate further exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gencerenerji.com/resimler/files/78330504741.pdf In PDF document text
    • https://o2opr.co/userfiles/files/vedinejejojusenituxoze.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210919020617.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/3468054183.pdfIn PDF document text
    • http://isdoor.ru/uploads/files/pekupo.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/80715289761.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/274350723.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362a1e414c1---fowifedagi.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/molikuwifoxon.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/43969535014.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a53128d3d5---zatuvowigovajan.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63418534498.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210919112107.pdfIn PDF document text
    • https://alariel.be/userfiles/file/wetuxapovizof.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/bupodaxonagezikebozemik.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/bigirubesavalave.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/56844821480.pdfIn PDF document text
    • http://tavio.su/files/file/kezinebuto.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/8399744497.pdfIn PDF document text
    • https://energooptima.hu/upload/File/wavafuvebaxotaw.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/58212719509.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/12692367544.pdfIn PDF document text
    • http://sinostandards.net/upload/files/dejaviduduwejetopu.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/98690200711.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/55287190373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=call+recorder+for+both+sidesPDF 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_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99B 17352 bytes
SHA-256: 8b48a609fc2b0e57f9949fcaacd036c3106b5d21b6ea7c1921c1beba617c8a83
font_02_sfnt_off0001264a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264A 10640 bytes
SHA-256: 3b104f3642e77a3fc1c7790d3d9bd1f2bcd40df1e0df6ec0e711254390b5e3c1