Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee627a4ec0b790c…

MALICIOUS

PDF

68.3 KB Created: 2021-02-19 23:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4468b613fe8f218a5f7fe9a5d49b3c54 SHA-1: 9ab9ed8642940d98090ec624e514a77d69649b31 SHA-256: dee627a4ec0b790c0512e58fc16c83fd0583dd88a10d70891d6779f736ad3261
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic flagging it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://jottigo.ru/strik?utm_term=razor+e200+battery+size', suggest a phishing or content-luring scheme, likely to distribute further malware or harvest credentials.

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://jottigo.ru/strik?utm_term=razor+e200+battery+size PDF link annotation
    • https://suzazega.weebly.com/uploads/1/3/4/4/134476369/4830692.pdfIn PDF document text
    • http://petonopelun.iblogger.org/fobijemunasubovimo.pdfIn PDF document text
    • https://bejitukinerebi.weebly.com/uploads/1/3/4/8/134890105/2a48c0a.pdfIn PDF document text
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/kirisoxisow.pdfIn PDF document text
    • https://lifefoxametuzov.weebly.com/uploads/1/3/1/3/131383893/347936.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/bisiku/55704918001.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/tapugo.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/audited_balance_sheet_submission_last_date.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/barney_and_friends_full_episodes_free.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/janukajifezonopafum.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/libros_de_ansiedad_y_depresion.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/93887333482.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/14001819878.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/baskerville_old_face_font_bold_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/wumuxapenolaxilesunoker.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_off0000cda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA2 5220 bytes
SHA-256: a5a8aa508da86e63d3fcadd0cd77d08907e366f1678dc28038c7794a1b7f139a
font_01_sfnt_off0000df7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7F 10944 bytes
SHA-256: 80df6ba2c68fdf4f55f067484bf2e7258095ae5c0455071f077486c4c9a0ed08

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