Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5e687607917b20…

MALICIOUS

PDF

94.3 KB Created: 2020-10-02 15:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 14e172077607a1c12d31137edee1f78c SHA-1: 7ecaef0b82cdebff111ca311bee175538069ce12 SHA-256: 0d5e687607917b206c7af553c5754af5ea4895fd5bb5d378e88c194d986b39bf
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains multiple embedded links, with a primary link identified as a malicious redirector. The document body text, though heavily obfuscated, contains a reference to the malicious URL, suggesting an attempt to trick the user into clicking it. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?keyword=achyut+godbole+books+in+marathi In PDF document text
    • https://site-1037120.mozfiles.com/files/1037120/98941970217.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/jofexov.pdfIn PDF document text
    • https://site-1040363.mozfiles.com/files/1040363/34413371556.pdfIn PDF document text
    • http://fuviteza.jbjclass.com/uploads/1/3/1/4/131437252/661474d2.pdfIn PDF document text
    • https://site-1037829.mozfiles.com/files/1037829/mulijofojarewutexigofibu.pdfIn PDF document text
    • https://site-1038851.mozfiles.com/files/1038851/50292788962.pdfIn PDF document text
    • https://site-1037142.mozfiles.com/files/1037142/dimabikoxaja.pdfIn PDF document text
    • https://site-1038827.mozfiles.com/files/1038827/38371016328.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/fimatirutitabosof.pdfIn PDF document text
    • https://site-1038931.mozfiles.com/files/1038931/tagutaxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF02 5648 bytes
SHA-256: 4feeb3fc0d61eb8eeb68ebd7ceb407e9ca2431453ae3e8a275e925eb02fbd334
font_01_sfnt_off0001120f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120F 12848 bytes
SHA-256: 31060e0800f47908448193d6983993272e87c7f6017c7b13bc5d5dc52315ef94
font_02_sfnt_off00013cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB4 15684 bytes
SHA-256: 3e8746c5a9423f5e679119b7fdf612251bea8a9df74b876c2198f2e957252069

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