Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e5b65e1b79990c…

MALICIOUS

PDF

72.4 KB Created: 2021-08-31 05:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 9109ff85d786b5bff95d5eeb1c50058e SHA-1: 8a1ae0853d7b59abe94ac84748c6100c069ff431 SHA-256: f7e5b65e1b79990c60630b656d51cc5e3a89148dc442d35fa1a95b8d09d99daf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=ammonia+production+from+natural+gas+pdf PDF link annotation
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f43517793---86874164726.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/43367352238.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/kirirotidokijorowuxe.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/lavegotelerekadig.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/18345563340.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d2558cd41---5401595317.pdfIn PDF document text
    • https://daismene.it/file/58297149381.pdfIn PDF document text
    • https://masihpt1.com/contents//files/78524325145.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/raweraribonuratewapi.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103e3e39d84b---gezegavivujepifupudi.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/05021a5ea3130dca875b82706bd11583/fumawovesolozog.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/35183030816.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/25117967140.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/64691906702.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/7d993785308dd008d03d68de5bc5c15a/93615191245.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b36cfe9cef---42107274852.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/74335550385.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/c3e97dc61afd7fb94843704db6659201/pefuvajuvevawimimini.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/61087a1dc1bd5ae3ee02e0405e3bab1c/67717439335.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/f09bf5c499209f30b504e713715843b4/didevojotexazuzejemojozo.pdfIn PDF document text
    • https://serka.com/serka/upload/files/53169932923.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_off0000ba17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA17 10912 bytes
SHA-256: 502259450838742bd0e2ceb0fd5e529d05dc534b7cac541b8d0808cdba302453
font_01_sfnt_off0000d31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31B 16340 bytes
SHA-256: 20dd3bf104f5653b0d04f5a17843164aa6b101a3a78ea84311c5cd5170d6b312
font_02_sfnt_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1