Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7de4e7561d0d0e…

MALICIOUS

PDF

75.8 KB Created: 2021-08-28 10:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d32d075fda29bb6b295cfe2dce3bc5f0 SHA-1: 96e2b7a86ba47569b48e9a3c49caac136c92f72c SHA-256: be7de4e7561d0d0edc54508ef64149c37ef1480e1ed3b1ce3cdf051b3cb39c81
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://juegosinflablesarizona.com/files/xezefugovoxedalatudivi.pdf In PDF document text
    • http://manpukulivermore.com/uploads/files/70581470134.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/xosumidukulenava.pdfIn PDF document text
    • https://incense888.com/uploads/files/202108250056325062.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f6c79b1e189bbd8aea96bc5a0229d57f/defakupinek.pdfIn PDF document text
    • http://fgosvo.ru/files/files/bipine.pdfIn PDF document text
    • http://isgsrl.it/images/file/23165864407.pdfIn PDF document text
    • http://chamdure.com/DATA/files/10674408163.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/49586358420.pdfIn PDF document text
    • http://ge-mak.com/files/tawinefol.pdfIn PDF document text
    • http://wych123.com/upload/files/21199627299.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/luxafuzeribux.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/g0ojflfi95unit9k1ckv6294iv/vudexelusanupoximekotu.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/kukofebarudelukebose.pdfIn PDF document text
    • https://lukili.ch/UserFiles/files/lifutagax.pdfIn PDF document text
    • http://hochrainer-elsner.at/upload/files/sovezade.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/vuvinoludoxosoweloluzuzo.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/91870662282.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb73e92b776---rosafifukumomiva.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/31e986f046ee132027ebfbbd36add0ed/52886025626.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/97199150890.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210703_4E8C98592DCBE274.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/gakutepune.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/mapijutezumasigibuxotijo.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160982a57e8884---14264954523.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607902e12df33---limidegobekaku.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c76274a3f---42737246652.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=first+conditional+speaking+exercisesPDF 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_off0000c4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B9 10860 bytes
SHA-256: d8fd7988689cd4b2fe53dcae09fa73ce2f1f527f073242f22c61dfeef2bf5ec8
font_01_sfnt_off0000ddb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CA 16720 bytes
SHA-256: 6069183ccd8d9ea022b909abdde5597462322a018e63d319f98b57fd44f7724f