Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9ab83025f35b6c…

MALICIOUS

PDF

98.3 KB Created: 2021-02-17 18:19:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c0594707d4aecc56e0719bfed7029fc9 SHA-1: 4dd7bca258ad8f5233dd3b383536fcfe68c8c3d7 SHA-256: 7d9ab83025f35b6c1cbd13b80205b2f25014c524987ded72955744dae3943b8f
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 as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. One of these links, 'https://seumenha.ru/strik?utm_term=sig+sauer+p320+duty+holster+with+light', is flagged as an external URI. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The combination of these factors strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=sig+sauer+p320+duty+holster+with+light PDF link annotation
    • http://noxezef.iblogger.org/giroxosiropolulos.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/FqmxZhb/25363090519.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/fcibggH/3721354517.pdfIn PDF document text
    • https://nuvitofoje.weebly.com/uploads/1/3/4/6/134640236/4363612.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fututajadijet.epizy.com/59087547051.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/22373662261.pdfIn PDF document text
    • http://tovujopojat.epizy.com/on_select_submit_form_jquery.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/godoj.pdfIn PDF document text
    • http://kosigasarem.epizy.com/84177136283.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/bromothymol_blue_safety_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/25977047186.pdfIn PDF document text
    • http://tikokowekujuw.epizy.com/72948796040.pdfIn PDF document text
    • http://zefuxaninegug.epizy.com/centre_formation_maitre_chien_gendarmerie.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/55184916168.pdfIn PDF document text
    • http://fasevirova.rf.gd/bunosugofowabawu.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014b57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14B57 28348 bytes
SHA-256: 60490156f7e494a89028034fb7ba1d942de5bc9fb37c360c765f5d429a103c3c
font_00_sfnt_off0001121a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121A 5956 bytes
SHA-256: 22e8548c5b5194c3310184c627d8f04af18e18cccd65abec8f7b9c88eb3bc3d9
font_01_sfnt_off00012669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12669 10772 bytes
SHA-256: 4b8bb5d4969f13b672759ac87edc2941d48d4bfc0e2f2818caec519dd59e898e

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