Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef4b2a492f8eb05…

MALICIOUS

PDF

74.3 KB Created: 2021-01-23 01:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7d597c71a127eced0486e69ef7ad5697 SHA-1: 742f9ed8b71818b263037e9523b2fa86ad1db23b SHA-256: cef4b2a492f8eb0547f0fbf1017cedd009930a66bbde52ffe36063b19e1e3f20
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains numerous external links, with a significant number pointing to potentially malicious or SEO-farmed domains, suggesting a lure for users to visit these sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

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/aws?utm_term=business+process+reengineering+ppt+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386084/normal_5fe5a9acaf96e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484370/normal_5ff333e021276.pdfIn PDF document text
    • https://xefikusog.weebly.com/uploads/1/3/5/3/135390274/fafetisijevaxa_gejujuzotopoba_gikejawobame.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fcfe4ca7c158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483103/normal_5fe005923f525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478123/normal_5fe5b11d70a68.pdfIn PDF document text
    • https://femidizori.weebly.com/uploads/1/3/4/6/134684525/gojasugofiwegatip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481064/normal_5fefc1dceee19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482870/normal_5ff2b28baae12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449630/normal_5fd36981cf65d.pdfIn PDF document text
    • https://tamukatiraf.weebly.com/uploads/1/3/4/7/134766395/zivanosojot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444647/normal_5ff5f15b99069.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/dutuzanob/mitosis_worksheet_biology_corner.pdfIn PDF document text
    • http://lixanixuzuki.rf.gd/chsl_2015_answer_key.pdfIn PDF document text
    • http://nemebikox.epizy.com/champion_song_carrie_underwood.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/alkyl_halides_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/sintomas_de_anemia_ferropenica.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_off0000e5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A2 5128 bytes
SHA-256: 262b0d404e9ad1802a773b598ed200bd0a351b658df1695c0e8089d44c51f0a6
font_01_sfnt_off0000f730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF730 10800 bytes
SHA-256: b43ad97fbee7ded72052a996c7cd8fa7eb336a619b46c8308192a433b5da5a80

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