Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c0c57a714a5361…

MALICIOUS

PDF

92.3 KB Created: 2021-07-23 06:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8d12dff109d6224210ec003241e56570 SHA-1: 1fedbcc3f9f015d65f33b386d451825fa5b14ea8 SHA-256: 09c0c57a714a53617ef245757395c8d5e884e648f6ff8ad129617350558e0a08
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a phishing or scam attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://lutechmed.com/Images_upload/files/53861704956.pdf In PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/tgk0q2ajj4tvr2cj8p2jcq8jfr/pukikujalamavudabejos.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cda539901d9---pozadaw.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/22526951330.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/30647778384.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/42bb3b7d551276714452723c84209103/38710126121.pdfIn PDF document text
    • http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/nagijuwobifewuj.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/49134283764.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/8c7a9a6cb863949122b956686387b74d/9631890568.pdfIn PDF document text
    • http://hms31.ru/img/file/84009755040.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609824dd55dec---wixivib.pdfIn PDF document text
    • http://parentini.it/userfiles/files/50834390694.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/66667658106.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/vubiguxexumofaveke.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/b8f67dffc6d0d656aaf959fb3f3ec087/kobuvodonijuje.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/359321537.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdeb661105---71611773651.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/b9d1091d08ec2fa8450ce81007673eef/gokonafafujexanafunuduz.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/ximodisubojakowa.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609950ddb84e9---50022318618.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/80f6dc60a8b7ff15fa2dda4b54e82722/vefukoborileguwexijebi.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/17926537571.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ecb2fa329ff---seduxoludozefafipemodet.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/94271663516.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160995bbfdc3f7---roribepupevatesimajupodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ginger+hair+with+blonde+highlightsPDF 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_off00010739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10739 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F50 10792 bytes
SHA-256: 8fbd2bc2b678280104f9bf177e2fd15b4e86a472cee78e716603b12db0b0dd2c
font_02_sfnt_off000137f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F3 16804 bytes
SHA-256: 3e56d77b3b0c264cfaae1ee293d0a02a38a8092b43554f00230339221e9511c9