Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b30b94b998170f7…

MALICIOUS

PDF

84.0 KB Created: 2021-06-29 14:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76c7b341d1581e187f3f43a2cd620231 SHA-1: 72a89e1602d70eddd44f4b5e9959652306c28f71 SHA-256: 0b30b94b998170f759f7b41d22bbc1ecaaf4d966d817ab9a9164ff3b6694d476
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many hosted on compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL structure and heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://archism.ru/uplcv?utm_term=do+cats+cry+when+in+heat
    • http://cc-loges.com/uploads/file/3361783411.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/515f0d65c06733738375f75235d4aa46/nowuzefuk.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099aa25a2929---61364279335.pdf
    • http://seventyfirstclassof69.com/clients/60772/File/xumujanubaradebe.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7367465450---31266204235.pdf
    • http://vds-construct.pl/userfiles/file/32234034410.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609225a1bc92e---73644701653.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/82e46be36ce01a204301e84794de4930/38410613811.pdf
    • http://alibabashipping.com/userfiles/file/7185018439.pdf
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/92626274265.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a18a9a904---44804519788.pdf
    • http://clinicaveterinariamontecchia.com/userfiles/files/sedowogosonanipaf.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/8177fe63591660a8cc85a03b10c830bb/vinolixivefidavajujanufi.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/76894463177.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/2f04f3be924297d68c310a3b0dff4f14/62033522892.pdf
    • http://xn--o79av69abka850ab6c.com/upload/file/202106010549145401.pdf
    • http://www.aadhar-interior.com/userfiles/file/63562168518.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779e5d35996---zaxajatagorasujatukize.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b653c0e495---mevagibetimizo.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160947f67319e7---palafuwutowegujujos.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d67cf3f72f---17913680088.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8103418e7b49741247d060145dba4b3c/30983397418.pdf
    • https://childconcern.in/trila/userfiles/file/fajufovebumeti.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16078945a2afa8---votulepadoxosadukivaku.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_off0000e71c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE71C 16792 bytes
font_01_sfnt_off0000ff2e.bin
eed9f2802ddaa0776b66b3e87284e09f838fb84e970b2de05da494624f9b9bf0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2E 16464 bytes
font_02_sfnt_off0001296e.bin
0ea6288c750a3c2b4c2faa1d4d5afe560dc67d779e07ad2eb38bdf1be6bdaf95
pdf-font-stream PDF embedded font (sfnt) at offset 0x1296E 10480 bytes