Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c243154bd62394…

MALICIOUS

PDF

81.5 KB Created: 2021-09-06 17:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 08020301f7275ad9b81759aaea5f4c16 SHA-1: 4502444b38c0f9ff3c9ed2e25ec813d1f43b8126 SHA-256: 06c243154bd62394c009b68f38180ded0cc735ebf16b079ccd4f7747e7d6d232
212 Risk Score

Malware Insights

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

The sample is a PDF file detected as malicious by ClamAV and an ML classifier, containing embedded JavaScript. It features numerous links, including one to a compromised WordPress upload directory and others on disposable hosting, suggesting an attempt to distribute further malicious content. The presence of a visual download button and the nature of the URLs indicate a phishing or social engineering lure to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=philadelphia+road+map+pdf PDF link annotation
    • http://briarcliff68.com/clients/71184/File/xivugiritulafisitudirak.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/54068216347.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/63189391932.pdfIn PDF document text
    • http://juncheng.tw/upload/files/saweked.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/58232371254.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/woruvobexoxos.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821bcb280b2---89885629527.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/vumom.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/89853213726.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089a92903417---13318381882.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/12161291504.pdfIn PDF document text
    • http://hyundaiokla.com/uploads/files/78796968414.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/82723091264.pdfIn PDF document text
    • http://mobitransjogja.com/files/lejiziniredibito.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/44462041129.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/wobanosirimofejinaxenike.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6c1a4cc02---53207750240.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/jafanudazeb.pdfIn PDF document text
    • https://gameclub.by/uploads/files/39673605526.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/d749558ceeb6be06ff67d4b31861bc04/jimajuxovirova.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/06/11/99084477711.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/kofesulurepez.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0390b4ea2b---76476856425.pdfIn PDF document text
    • http://developmentassociationofnagaland.org/nbloom/fckuploads/file/bopafaxupuzamekiguwa.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/kakaganonenadugir.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_off0000d56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 10396 bytes
SHA-256: 85cf4396c468981d78beda7e626746e9f3b316fec06c1270e15aa11ce8af6507
font_02_sfnt_off000104dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 19356 bytes
SHA-256: 15b23dfe44c86e7e455303d5bd7c348ece1703d9093cb9cc34cb2343093252a7

Open this report in the interactive analyzer, or submit your own file for analysis.