Malicious PDF — malware analysis report

Static analysis result for SHA-256 217aae0ea8e32324…

MALICIOUS

PDF

83.6 KB Created: 2020-11-20 05:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 65ef736e7d7d961b5663ceea0755b66b SHA-1: c96a515fa245c03382a5cfcf921cf3dff4dd1ee9 SHA-256: 217aae0ea8e32324a6972fbb4f0c60a6d7b2a0e50aa24850594ee5a922bbda05
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains like 'weebly.com', indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs and the nature of the link farm point towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://trafficel.ru/123?utm_term=bliss+v.+commonwealth PDF link annotation
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/zafipaxikesexu.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/ad7f24586.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/8009155.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/6457516.pdfIn PDF document text
    • https://zonisobeb.weebly.com/uploads/1/3/4/3/134333784/0157698aa47d.pdfIn PDF document text
    • https://vibitaxipeni.weebly.com/uploads/1/3/4/5/134526550/0558b22e.pdfIn PDF document text
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/rebujonifalimon.pdfIn PDF document text
    • https://luvikexixof.weebly.com/uploads/1/3/4/4/134481561/vibijetewobumemigubo.pdfIn PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/2d329a9582c1.pdfIn PDF document text
    • https://vanawolibonute.weebly.com/uploads/1/3/4/3/134344109/nakeviwapemut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gosete/stalker_spatial_anomaly_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d89f6767-3b74-4016-9c75-7149e3776b38/how_to_change_your_name_in_roblox.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/bolero_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca58b23-cdef-4f6c-a083-816c94e20fe8/40644363188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b87307c-7321-42b7-b231-7ae71dcc54f9/33539455033.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 4964 bytes
SHA-256: ba9a0dbb27cac83e2671e4a7aaeabca95f9fd5ed8df56b1946b2a33b392b5a83
font_01_sfnt_off00010b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B81 12196 bytes
SHA-256: 994c7cbb9f9da6fcbc95d9a8918ccf6f594151375736b32f9e38f8a6d03bb93e
font_02_sfnt_off0001331f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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