Malicious PDF — malware analysis report

Static analysis result for SHA-256 e179dd8391919b28…

MALICIOUS

PDF

87.8 KB Created: 2021-09-06 05:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ec1f94e9d77f093ed4d815a7c92459e0 SHA-1: fe79b20be235ef8ccbdfa5d4cfa9715562896597 SHA-256: e179dd8391919b28403a9f817e0dbe5bf9999c0d69262b9a3bb37ce98eaa129b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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 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.
  • 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://aterhesseg.com/up_image/file/96079662645.pdf In PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/moritidelexuxerev.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/b59v21vh0i69b4e16q8jrqbo60/62210280859.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/95539908295.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/dutevevapale.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/goxajawepemonugexi.pdfIn PDF document text
    • http://pgpartyrentals-decor.com/clients/9/9b/9b45d36a3a4d562467d70d81bd292783/File/zedomapave.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba17b0a5762---dafegikejamuv.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/0ibtidj4vler80ql334cgckaq7/91449129850.pdfIn PDF document text
    • http://smeclassof1987reunion.com/clients/37165/File/73171882039.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/ba13f8097d48a55b0c7b8e50e65240f3/bekisawinowagavaxeroraw.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/17447326291.pdfIn PDF document text
    • http://masonhn.com/d/files/mabedatalukiketusebubev.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210507105047151.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de9d38eae0f---viliwokomerelulepigu.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/84742685499.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/47381202254.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/zekiliruradesifizu.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/tesobunusipapudonil.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/larakonatogupiwivod.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8da8c66ce---89560780620.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=radical+acceptance+worksheet+therapist+aidPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/bf53901858fd5b4ec63762abe6fe133c/faxabewukelameri.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_off0000f244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 10836 bytes
SHA-256: dc566d91f6c31de0fe7b52cfa8270ad311c45c7835cec4c17c44c97a4e4c3a50
font_01_sfnt_off00010b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3B 18024 bytes
SHA-256: 628732727876f1b137b2ddc384c32556af61ac38b5632adbf57cc2f07144aa50
font_02_sfnt_off00013970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13970 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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