Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dff1f660c58f59f…

MALICIOUS

PDF

65.2 KB Created: 2021-01-28 02:52:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 274e1274d534feedb2b2735682639bf4 SHA-1: 96525f4fc7e64fc19f439c563d095aed854aa779 SHA-256: 2dff1f660c58f59f46b3b743dab9c2650574152d1921ba8f6e8527d3b60d9a8b
214 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, identified as a link farm and a redirector, suggesting a phishing or malware distribution attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely spearphishing via attachment.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=adobe%20photoshop%20fix%20apkpure In PDF document text
    • https://jizotigop.weebly.com/uploads/1/3/0/8/130874082/joxex.pdfIn PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/1761518.pdfIn PDF document text
    • https://cdn.sqhk.co/zujomawa/Unjji5W/ravirevinamomudu.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/3fUKNhg/simplerockets_2_mods_download.pdfIn PDF document text
    • https://faxexivironi.weebly.com/uploads/1/3/4/0/134042341/vurepaxux.pdfIn PDF document text
    • https://tuvugeti.weebly.com/uploads/1/3/4/1/134108896/8892602.pdfIn PDF document text
    • http://luminar4-download.xyz/722640670349rxy1.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/guxosa/meme_generator_pro_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/ps4_quiz_games.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/cardiotonicos_farmacologia.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/call_me_claus_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/24057853622.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/65277519512.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/romikejata.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_off0000c616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC616 5360 bytes
SHA-256: 1b88665225d13c6b3107bf1ad7aa95ec2b6e01acebe9f4ba4278d9452d927700
font_01_sfnt_off0000d84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84A 9388 bytes
SHA-256: 77b9580da9e56d126362b9ff755a3abf0639f4c8d3af086b373779959604beca

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