Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d5854d352b4569…

MALICIOUS

PDF

68.7 KB Created: 2020-11-25 06:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c5771618d8cb27e1f9235b62bb07043 SHA-1: 136d073767e02ba6a3b15945b1e6dc59f3981831 SHA-256: 86d5854d352b4569afa0ee1390aee8344c48ce4c0c70ea7731dae81d26967dca
214 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical finding for redirector links and a link farm. The presence of numerous embedded URLs, such as 'https://ggtraff.ru/123?utm_term=middle+school+volleyball+court+dimensions', strongly suggests an attempt to lure users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=middle+school+volleyball+court+dimensions
    • https://tokawokemiw.weebly.com/uploads/1/3/4/7/134730305/1118719.pdf
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f8ca32232bd7.pdf
    • https://nexawukuvinu.weebly.com/uploads/1/3/4/5/134578226/8661e.pdf
    • https://cdn-cms.f-static.net/uploads/4403127/normal_5fa63ef4dc7f8.pdf
    • https://zimazegikej.weebly.com/uploads/1/3/4/7/134732290/nudetipew.pdf
    • https://tupivoxutod.weebly.com/uploads/1/3/4/4/134467409/6122964.pdf
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/kimorinib-nawedajasamevex-penitawut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/861c1391-b8d7-4635-a361-9f93589f0998/nabonubosumusirilubitol.pdf
    • https://uploads.strikinglycdn.com/files/081600db-ce6a-46fc-90e0-fd4752bae7e1/mio_alpha_2_manual.pdf
    • https://uploads.strikinglycdn.com/files/24c2d9d3-0b45-43d2-8584-67dc8866847d/5691767959.pdf
    • https://uploads.strikinglycdn.com/files/20c5e484-08e1-4b63-b6ba-10b0d9a76c02/86854451516.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdcf.bin
3f46912cc4213977e87c97953a5949a93a8fd3352a363df3b8973671a10c2ca1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCF 5484 bytes
font_01_sfnt_off0000e067.bin
eb23e94ef8818d19167888b826d5256a22ec91e9e730a272b1c9c863b646e08a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE067 11020 bytes