Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd3be0fcf14fc43…

MALICIOUS

PDF

127.1 KB Created: 2021-06-04 08:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e96ecf6714ba0bce9d4aa5bdadb6f740 SHA-1: 75de51e4d3e042259c52954df0c2004f2695b792 SHA-256: cdd3be0fcf14fc43b9c96b4330d617cb8cda1b1698b7370d0e859c4f02ed8344
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/pbw?utm_term=free+gift+code+goddess+primal+chaos PDF link annotation
    • https://lizoxezubim.weebly.com/uploads/1/3/0/7/130776499/gifipowezomudor_joxakakak_xewetoxugofime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426697/normal_605d89bed4b0c.pdfIn PDF document text
    • https://nudikiwo.weebly.com/uploads/1/3/4/0/134042489/7270562.pdfIn PDF document text
    • https://nujirami.weebly.com/uploads/1/3/1/3/131384028/5ac9ff24fb971.pdfIn PDF document text
    • https://nelajelax.weebly.com/uploads/1/3/2/7/132712676/sevevibetogosa.pdfIn PDF document text
    • https://fenanenu.weebly.com/uploads/1/3/4/2/134265689/ranuposi_midumizasevag_rowesum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375702/normal_60314b86c4030.pdfIn PDF document text
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/xagolininufo-farozijavixed-zumigesab-zavufu.pdfIn PDF document text
    • https://wuviwozerax.weebly.com/uploads/1/3/4/2/134266003/008291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495684/normal_6053c2964da99.pdfIn PDF document text
    • https://birulevisim.weebly.com/uploads/1/3/4/5/134584726/a1f1255acd0f326.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4448124/normal_60aff1feb5ffc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gosirata.pbworks.com/f/jupaxumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1d478f-8fc3-4686-915f-368bf75f7290/toxomagalitixenezaduwef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2733141e-f748-4a37-96e3-2ea3429e6e64/15510903149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd6f849-56e7-4b87-b1f7-4af4abebe806/age_of_war_2_hacked_unblocked_weebly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13093e02-bea1-4522-b8dc-f7cf197f8096/69679585244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46716ffe-b5a5-4621-b014-e28fddf3c109/tecumseh_5_hp_engine_oil.pdfIn PDF document text
    • http://nipekari.pbworks.com/f/tamil_dubbed_cartoon_movies_in_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/968ff238-981f-4e9a-9f4c-90d9ef8030f9/qu_son_los_medicamentos_esteroides_y_para_que_se_utilizan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ec9f54-6b5c-4eb8-894e-f677cbfd37b7/what_is_ariel_from_the_little_mermaid_last_name.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://scripts.sil.org/OFLIn 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_off00019a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A09 5524 bytes
SHA-256: bd08a088c761dfe3e78a696c22e18322112f70a3b1ba6c3be4761bbf39b1ae2c
font_01_sfnt_off0001acae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACAE 13648 bytes
SHA-256: 227e24e577fee70ce6709967e47c7ccd6407732f64d1c16c81c89e8d90d1416d
font_02_sfnt_off0001d826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D826 16336 bytes
SHA-256: 75d8e3690645038efaed8899ffae7ee1a7220ae83e2db94e0dfa533c51d5b6a1