Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a708664e852e32b…

MALICIOUS

PDF

93.8 KB Created: 2021-07-14 04:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d26e4263f7c40637da86119c92b2cb64 SHA-1: 1cc8e91c9f8cb5c4f241dbb140d6ad11d534c76d SHA-256: 5a708664e852e32ba04846cd442664ada1633c9b55e0c93b7d0b093e18c147fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or malware distribution attempt. The file functions as a link farm, containing numerous URLs that point to various websites, many of which are hosted on compromised CMS platforms or disposable domains. These links are likely intended to lure users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://wastran.ru/uplcv?utm_term=for+a+meantime
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/57123948571.pdf
    • http://coumert.com/images/file/juratiwodugekum.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b8358539d26---nazulizerojarimagejif.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/16881895629.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/6dq2bj67dnn6g6a0ljkf5dllkd/86377467397.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/059064b4d1ca6e72d99e650adac43643/bekoletogipum.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d6367032a0e---65670850975.pdf
    • https://mbzl-pro.xyz/web/img/podborky/files/duvitorilagizu.pdf
    • http://aivieksteslaivas.lv/userfiles/file/vajurenikefelajutijiba.pdf
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/62705056.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/2oj3n6ajfu9muoctjkko5rc7aj/xagir.pdf
    • http://omegapizza.net/uploads/files/84167156997.pdf
    • http://www.buildingmalawi.com/images/uploaded/documents/zakafaxeritija.pdf
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/gofimifuk.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160d54beb788b1---wunoni.pdf
    • http://xn--49s538bo8ux8c.net/userfiles/file/79733829531.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f3642ec30---jewubakurefigod.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16094425a78fe0---woforav.pdf
    • http://ahcxdq.com/uploads/file/071242175618.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa711049e8b---21473711833.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/75338dbc2e91c0435f40cbf6c0bea62b/43023990001.pdf
    • http://peaceinsrilanka.lk/userfiles/file/demitogaretomun.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010d4b.bin
879ec95e2654cdff51f8a26e212ed2e183b8af42d816ed2756fdb45a2b90f37f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10D4B 17580 bytes
font_00_sfnt_off0000defd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFD 16792 bytes
font_01_sfnt_off0000f714.bin
f48228ca70ccfe7e359c5d3bbf6c70db05d602ca65765a34236182146fdff81f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF714 10032 bytes
font_03_sfnt_off00012862.bin
b23f12cee55b733c6d13c76f8a7b5332a7c2a37c90a49664a2b66c046084b186
pdf-font-stream PDF embedded font (sfnt) at offset 0x12862 21104 bytes
font_04_sfnt_off00015ebb.bin
3ebe9aee78ed289672b632d10378964c618def66ddaf2deb2c435dc30c8dd21f
pdf-font-stream PDF embedded font (sfnt) at offset 0x15EBB 2492 bytes