Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2e62a8bb4c1d28…

MALICIOUS

PDF

66.6 KB Created: 2021-02-15 08:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e5d9628a6469fa0dd41b4b24ec19b1ff SHA-1: 843f458a286b889d341ceaa12c67261c15dccd14 SHA-256: be2e62a8bb4c1d28d88dc33c8c2c17fabf7b2691fb995354fbbf67c8b2fc70f5
156 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 0.9998

Heuristics 5

  • 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.
  • 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://maypoin.ru/wix?keyword=rees+howells+intercessor+study+guide+pdf PDF link annotation
    • https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/mivejitajunigupe.pdfIn PDF document text
    • https://levalezekavazif.weebly.com/uploads/1/3/4/6/134639406/3873883.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/PjilRdA/musodowuxufomibeno.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/djib8bW/59082238590.pdfIn PDF document text
    • https://sinekamawo.weebly.com/uploads/1/3/0/7/130776883/7163399.pdfIn PDF document text
    • https://kekugijofer.weebly.com/uploads/1/3/5/3/135321092/4710060.pdfIn PDF document text
    • http://dijawobal.iblogger.org/gluten_free_pasta_sheets_morrisons.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roxegubipav.epizy.com/reformas_borbonicas_economicas_politicas_y_sociales.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/asphalt_8_cheat_engine_6._6.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/siwubafunisosakipegonebof.pdfIn PDF document text
    • http://demuremapinob.epizy.com/69635364688.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/44876732946.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/free_printable_hand_template.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/binding_site_optilite.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/37715497771.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/ffxiv_astrologian_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/budawujalo.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/minnie_mouse_birthday_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/jafemenejozujaxa.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_off0000c7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FB 5408 bytes
SHA-256: c6d8c82b327a3fbb8d162a393b6b2c47d09d5d481c9f9bca933b2a3860bd072a
font_01_sfnt_off0000da82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA82 10160 bytes
SHA-256: abbae22224d631652c3014e4d9fbcb8e5b4f375369e975c328f3ca2aab700645

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