Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34deadf85bc9cf3…

MALICIOUS

PDF

93.6 KB Created: 2021-07-05 09:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7a70ee8cf5ee154f2cef420fa1efa54d SHA-1: 6cb1cb4e29c93d7f89010a3564769b1894aa4188 SHA-256: b34deadf85bc9cf3a48fbc1013e0b5c6aae8e44ffa94472abbcdda52b9a38eea
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised or disposable domains, suggesting a phishing or redirection scheme. The presence of external URIs and link farms on potentially untrusted hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • 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://garglob.ru/uplcv?utm_term=how+to+rap+on+the+spot PDF link annotation
    • http://goodwill.pl/userfiles/file/31313071193.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/vaxixazozutebe.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/eaf068fa80bb216659e26d7b754b3dbc/pedapidaviteropisuxi.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/jidejiwobabegemumatinibuj.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/75243961228.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608922cce01a6---24246160210.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/vopoluxexojakoxekuxelox.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/foginodafobolagumaguxese.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210623153813_g5hehx.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecec38cf54---57945874147.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cc6a3ab06---munebilawosopugenu.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838e83087b9---jisetagonadezetudexeser.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/15876405898.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607961a777f78---44481408819.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730510e42b2---72847075083.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854030924bf---tufomutil.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/wepog.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/36131581224.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/36093945248.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c7bde44d8---32754099751.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/i1kfeo06jembh695l28ocfubtv/70814124852.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/safawitejupabuvodibovawex.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/f9b8f8bff4b393c5b40686311d59ff2b/43839421519.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/lezosajujijosona.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_off00010d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D31 10288 bytes
SHA-256: 8a4911d2e82d10b1851d23e9ac0bc0e99815fec39b81d261b48f64cd1e461da1
font_01_sfnt_off00012453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12453 17232 bytes
SHA-256: dc01fac281ae4e75839e37a11f00457594d22a22619bc88ea3cc6944994fdb6c
font_02_sfnt_off00015144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15144 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1