Malicious PDF — malware analysis report

Static analysis result for SHA-256 575d42aa725dd7e2…

MALICIOUS

PDF

84.8 KB Created: 2021-07-04 04:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 602a93c4f20557658fa03c3f43d4486e SHA-1: 5b5ac6c0c7cbc128cf667d2428ef0b9e6600938c SHA-256: 575d42aa725dd7e227fb068adc391b5bd0c93c52251e3a1fe03075c544198b32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, directing users to a multitude of external websites. Several of these URLs point to compromised WordPress installations or disposable hosting, indicating a likely intent to host phishing content or distribute further malware. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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://medvor.ru/uplcv?utm_term=acrobat+reduce+page+size
    • https://reniuved.it/file/10474998318.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160c9837f5da60---rebolazejawotipug.pdf
    • https://angelsstaff.com/uploads/file/masoxifomujulomodez.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/stg5ks0dmc1tj2aus1j36ps934/fututodet.pdf
    • https://alatheir.com/atheirwsfiles/file/55062055951.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/411ba82be9c9290b11401482bbf97018/52518825115.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/f9517576bd12a252d70e0f117b608cce/wifojulawojetinalobari.pdf
    • https://advance-pack.com/editor_upload/file/23944239784.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/a299029482b01215fc0cd865309712bd/4987200032.pdf
    • http://rockpapersun.com/upload_mce_image/file/92613093816.pdf
    • http://anhbanglaw.com/userfiles/file/48943007707.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/c1790e94707294336fbb2d027058fee9/xupewidaginajexuvu.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607082e6532cf---lotamitefosisudosojixiput.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b607265e012---fefutobuwetimovo.pdf
    • https://detectiveoffice.net/userfiles/file/12694219328.pdf
    • http://www.contectrade.hu/fckfiles/file/64543837840.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8b8bed20e---86864210085.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/3ef8m78t83jgmvpsl3tqsvh1v1/kozaparepesemu.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/71446877165.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a65edc1ad97c5bf1624b2d53d70aa546/kavapixofumenawawonu.pdf
    • http://lamdecal.com/Images_upload/files/wuxazidemago.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a0d0ea1d44bdcf0f7c31dd8f429db612/82750247355.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE86B 16792 bytes
font_01_sfnt_off0001007d.bin
c59d7aded0cda80faa6b001ebc414f928b22ec614f908651174195fbe28ad016
pdf-font-stream PDF embedded font (sfnt) at offset 0x1007D 17212 bytes
font_02_sfnt_off00012d78.bin
abb7b2201102c3fdf578499c36b5a9d990751a91e1f8e158264cbfc430ed443c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D78 10820 bytes