Malicious PDF — malware analysis report

Static analysis result for SHA-256 2914ad27393522a4…

MALICIOUS

PDF

71.1 KB Created: 2021-09-08 11:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b11f82b3c4b6f4b78bcf34640cdf9833 SHA-1: 9027f5260dd082072c4db6d7d06fb43bfcfdf75b SHA-256: 2914ad27393522a41aa6de84082e0a5a12939192b31a1e86ae2663a184804c9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=morphy+richards+convection+mini+oven+manual PDF link annotation
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8ab2b7506---7266226336.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/76575567144.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2874ab932c---454409628.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/jedatokomusuporebofeg.pdfIn PDF document text
    • http://www.celso.org/download/62335416698.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/mewepujawapodafuk.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161060cc8a5f9b---gapigofimifegudezuru.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/5386862918.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/fotagi.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/64366760143.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/84599589831.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/nekumivolagifo.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/62329562686.pdfIn PDF document text
    • https://naves.cz/res/file/votonugakeridew.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/42636478624.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d3907837bb6---84586677316.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/vemor.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/f5c9207e304d2677739e9e45e006cf82/sazafepu.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d15897b91---12519390660.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/d8c0d45f83dc1ed4f8ffc00ab91266b9/73678610856.pdfIn PDF document text
    • https://wineart.online/userfiles/file/75892552980.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/porunulonimix.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b40a0a7f294---2087647082.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_off0000b3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E8 16264 bytes
SHA-256: 5912e9c5d224503b1865d97326ab297bd3a4cf4cb2869415a7fa63491d370a48
font_01_sfnt_off0000dd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD47 11052 bytes
SHA-256: c635d855aa520f068b5a92ff8bcbd5caafbff685e23670c741d7eb8dffd8e73a
font_02_sfnt_off0000f6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1