Malicious PDF — malware analysis report

Static analysis result for SHA-256 0464cce9b0566b28…

MALICIOUS

PDF

84.9 KB Created: 2021-09-01 05:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cb7b6fb5ef44f415c2ba29d8832dac31 SHA-1: 9f7e9b4635228d2ccfdea1662c9690b918cc017f SHA-256: 0464cce9b0566b28eea940ffb1a44692e2e3fe231bcb54ea7ba081e7082d4786
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised WordPress upload directories or are hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://infrive.ru/uplcv?utm_term=how+to+put+text+over+an+image PDF link annotation
    • http://madiagranitosilano.it/userfiles/files/jemolumifopeti.pdfIn PDF document text
    • https://kar360.com/resimler/files/69691908600.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076a1eac0a2c---dezofatimirogobu.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/zukidobovamojofirav.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/pewukewonosejekegixi.pdfIn PDF document text
    • http://cmcthailand.com/ckfinder/userfiles/files/betizovajefevukofuliloj.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16080f16d1d2ad---19106447257.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/vimerekegomijakaso.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e2c2b023e0d---furimewibimumunol.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/59725745087.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/vufivep.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/19399983304.pdfIn PDF document text
    • http://ucity1967.com/clients/f/f9/f95c10655bf48216a4b8c8e4321ec146/File/bixajesinavapizal.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082538441512---vopujixosutezo.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1610a6b3c63111---roreg.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160983685042a8---42884156398.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210724_BECBEA1B427F3B0A.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/63488978563.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/fa198d9697337b74c9b4470fd7a17fd8/jumozinoromolutapedulowax.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/803be524515fe6192352e155b3bb5fdd/48004964513.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/vuwadikigabipuzu.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/navc9fqfqhgu98ijfu9mn4gafp/56976099093.pdfIn PDF document text
    • http://recviem.ru/img/upload/detosa.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d7f7cf75afd44a055b6f145441f5e3bf/taxeson.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_off0000e7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 17288 bytes
SHA-256: ff0f20020fface02bf4cb40d33516b85a0ef5c90eb0d60520349b298bf07484b
font_02_sfnt_off00012c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0B 10724 bytes
SHA-256: 23b925be0e0352e6c09131ec15ee658951ead7c0bcc6a5ff93a89cc9b9d79884