Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e717649669eb23…

MALICIOUS

PDF

84.0 KB Created: 2021-09-01 22:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 79f5b40d27c0d7bf80461c2d921e44cc SHA-1: bdf67d74fe7ffda97b7647282cdffe857adda116 SHA-256: 06e717649669eb2388097880d51c55543bf56c582b72f0a6f3da115d5e0315d4
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam. No scripts were extracted, but the structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://catamma.ru/uplcv?utm_term=how+to+make+text+border+in+photoshop PDF link annotation
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e61cd8df222---xavidezopetaletezazir.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/6858405563.pdfIn PDF document text
    • https://ingmarcomantovani.it/file/futaterijabidiwulisa.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610d4cfe4c00b---54292847553.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/rosutozopelanativoju.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/51519079975.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/vozazofumenetolamupok.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/xawemexitonilikavu.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/reneziwelolirelanigel.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/9782788247.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/senovim.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/wuxevog.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/da7e9a8626465b4055796cd6c6f66e08/dosuxom.pdfIn PDF document text
    • https://tigaintan.com/contents//files/88537943743.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/sromf54bja06i9b9i54a71bp84/31998371465.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/saxuginuwivaf.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/5e6978243ca6940afed22cdc6946359c/51962822224.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/vifixogegiziribiweko.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/sameveruta.pdfIn PDF document text
    • http://helloslow.com/data/userfiles/files/23527648285.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/wewaje.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_off0000e18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A3 11020 bytes
SHA-256: dbc2310b5843dba8923211506f700edb22321ba449d1a11bc652886c1b8416e6
font_02_sfnt_off000112d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D6 18236 bytes
SHA-256: 96a5469fbcdd5bfb31980f4e80b973ce07db23693b377e5b0a8aa104e998ed8c