Malicious PDF — malware analysis report

Static analysis result for SHA-256 04adcf1c1907d1fa…

MALICIOUS

PDF

76.8 KB Created: 2021-03-20 15:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0a9ee2a3205cdc897c8b34a9a8912d01 SHA-1: 213520b55aa041a6af53b79d4a111f4384090bb3 SHA-256: 04adcf1c1907d1fa011b1dc4174e771276005860d0851a930be05eecc6a7713f
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://resalured.ru/aws?utm_term=free+calligraphy+alphabet+sheets PDF link annotation
    • https://gegilegaf.weebly.com/uploads/1/3/1/3/131383227/ebb92d.pdfIn PDF document text
    • http://ehaberdevlet.com/wow_vanilla_cenarion_circle_rep_guidetuny6.pdfIn PDF document text
    • https://maxijegiv.weebly.com/uploads/1/3/4/1/134131269/boruterisirepo.pdfIn PDF document text
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/84a334fb9b.pdfIn PDF document text
    • http://italystore.pro/digital_signal_processing_mitra43w16.pdfIn PDF document text
    • http://klosheff.xyz/is_gene_therapy_ethicalxfsre.pdfIn PDF document text
    • http://fitdieta.com/hoover_windtunnel_air_steerable_upright_vacuum_partsgp1y5.pdfIn PDF document text
    • http://fenellalucynelle.info/pekopafenozugobdlk9g.pdfIn PDF document text
    • http://optalpha.com/supple_leopardmzmis.pdfIn PDF document text
    • https://bujovuve.weebly.com/uploads/1/3/0/7/130738596/vutav.pdfIn PDF document text
    • http://visionnew.xyz/silent_hunter_3_demo_downloaduldnd.pdfIn PDF document text
    • http://strongcreditscore.info/nexisurexamugepupisiz20y80.pdfIn PDF document text
    • http://razvivatel.blog/nipuvowobizpok2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_67e213e2ca844336ac1980094bab1def.pdf?index=trueIn PDF document text
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_26331772659647b38f181680dc8aaf88.pdf?index=trueIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_7ee3cfacf8c840f7b6d2e8d618ed61d0.pdf?index=trueIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_545003903f6b443fa55a4ebab7017dd8.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_86a4e70b8fe44f479535d16c2f73ac49.pdf?index=trueIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_8c7a323a165444a6afc2d546ec05c620.pdf?index=trueIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_f3bfbfd965af437cb6e2a718a8054405.pdf?index=trueIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_1b0444dfe37041399afa3cf9e6877bf2.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 5392 bytes
SHA-256: 83adcc61067933ab96199243ba561b76ea098ddb745e35ad701c305029130bb2
font_01_sfnt_off00010117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10117 10784 bytes
SHA-256: 66530d7ddabc65ffd7b82326536f41823d591f3be92e47d2cff5c279e01edf14

Open this report in the interactive analyzer, or submit your own file for analysis.