Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d8eb6266b6887d…

MALICIOUS

PDF

72.3 KB Created: 2021-01-31 04:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: acb53dee42411cdc70a725043ffbda21 SHA-1: 378eb4321d5d21c3a2da59bb01965e4cb9296173 SHA-256: 10d8eb6266b6887d47c434f83a86c2b942e94cb6c7cabe43b5ed60aee1015041
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://baarspo.ru/123?utm_term=destiny+2+trace+rifles+pvp PDF link annotation
    • https://gosomojigu.weebly.com/uploads/1/3/1/4/131438658/6f16435.pdfIn PDF document text
    • https://ditufanavuj.weebly.com/uploads/1/3/0/7/130738569/bexogitewotodivexi.pdfIn PDF document text
    • https://tedatigajixa.weebly.com/uploads/1/3/0/7/130739480/xewiwufurofab_luvoma_tukipu.pdfIn PDF document text
    • https://kebolegenadudus.weebly.com/uploads/1/3/1/4/131454121/xizibogan-vilix-mobus.pdfIn PDF document text
    • http://pinudub.iblogger.org/brushes_photoshop_cs5.pdfIn PDF document text
    • https://zawurufaxi.weebly.com/uploads/1/3/4/8/134861846/7557069.pdfIn PDF document text
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/babam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371013/normal_6005dfc793684.pdfIn PDF document text
    • https://rejovofutilux.weebly.com/uploads/1/3/1/4/131484728/7500933.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/78843451033.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/68752882742.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/edgenuity_dilations_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/writing_task_2_sample_answer_band_7.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/cruel_angel_s_thesis_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/59804415569.pdfIn PDF document text
    • http://dixuzudes.epizy.com/apache_server_7._0_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD80 5304 bytes
SHA-256: bc07f5e6d070b941aea8ceaccea9e87abb40de1354dbc1e2c3565b30c76b668f
font_01_sfnt_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 10888 bytes
SHA-256: ecc70e90168da6aff500d599b81060fe5dc7291526d2371b2bd80645a80e3f3d

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