Malicious PDF — malware analysis report

Static analysis result for SHA-256 5036b52ca4552f5c…

MALICIOUS

PDF

77.9 KB Created: 2020-12-08 23:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fd3e07749a331b6b30bb91576fcf4baf SHA-1: e98a5532aaa958ee69fe60d06d6da5d25c5be683 SHA-256: 5036b52ca4552f5c9d8dd3cd87d2f4d12a2279856920c4736ff2ac888b14051d
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the presence of numerous external links points to a potential redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://trafffe.ru/strik?utm_term=1.1.4.5+packet+tracer+answers PDF link annotation
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/foguvujineperake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476756/normal_5fb2b1c71226a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415768/normal_5fa4ae2029f95.pdfIn PDF document text
    • https://neliwoxe.weebly.com/uploads/1/3/4/8/134871618/balunefi_lixusikis_divinejaxufopi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447280/normal_5fc969efb24af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc8a50d9-5b0e-4b0f-9c89-ba53b244d347/coldplay_ghost_stories_deluxe_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f162dae0-6414-4d83-9e5a-25c4137ce7e2/18284636772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5fa99c-9ee9-41c9-9ab6-1bfdebafe38d/95775096905.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10f0fab79f442f22a8155/t/5fc1466a61e25426e1673644/1606501998845/27432271590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb3dc25-419c-410d-b41b-ab0ec742ab29/john_deere_l130_pto_clutch_wiring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e4e4db3-b0e8-4c79-b1ba-7d4157748f5d/download_film_fast_and_furious_7_mp4_sub_indo.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_off0000cc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC65 11544 bytes
SHA-256: fbb039de782e79f7a8b0e2432156faea57fc162eb4437d2a5f112bb4625fb23b
font_01_sfnt_off0000f297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF297 5252 bytes
SHA-256: a5ae93f4ec9fd442b4bc24c78298fb2b564ebb3837c680adb9829a4452d39c21
font_02_sfnt_off000104aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AA 11208 bytes
SHA-256: 122c71bbf5d8e539e5830ea3f4734e89822c4b72632483604673c979c5a29880

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