Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ec406f06c2df4f…

MALICIOUS

PDF

58.9 KB Created: 2020-12-20 17:35:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a8fa58b3fb15365f4c1d460bec651371 SHA-1: de885d2601c4fe0cf7a4f6c6da3cd834f5ce7e06 SHA-256: 92ec406f06c2df4f2dcf4795eb97ad45c3f04485df0210f7def441998cc6f335
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector and a link farm, indicating a phishing or malware distribution attempt. The heuristic firings confirm the presence of malicious redirector links and a link farm within the PDF. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely leveraging a PDF exploit or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gettraff.ru/123?utm_term=sokkia+total+station+user+manual+pdf In PDF document text
    • https://petapizegu.weebly.com/uploads/1/3/4/3/134327096/3984805.pdfIn PDF document text
    • https://lupenasax.weebly.com/uploads/1/3/4/7/134738003/sarep.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kekikefuwu.pdfIn PDF document text
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/fd98e.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/217f76bf18fee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0d785085bf90c0efcc6ad/t/5fc18f1c9d79364840c8b7f7/1606520605337/46383641477.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/98597798857.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/bangalore_days_malayalam_movie_bgm_ringtones.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/68531550504.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5355c24b06a7eb31bb18b/t/5fd6fd0dacac596b0cd0a3a6/1607925006481/capitalize_words_in_google_sheets.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_off0000aabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAABE 5352 bytes
SHA-256: 78edf8f54614f92bce91ae2fd930f83173a247c67f3a81471675b3b73179f60a
font_01_sfnt_off0000bce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE1 10520 bytes
SHA-256: 8c6f4bfc492b21be8c52b59467bb23033a00635dd1d5717edda1e9ca5d1f958c

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