Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1c58369871ad3b…

MALICIOUS

PDF

77.2 KB Created: 2021-01-11 16:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 11f2a829184fa6593d8d38f4cef2e2d1 SHA-1: 9606227c5cb2ef39f0cc0f9da295492ee111fb43 SHA-256: 9c1c58369871ad3bf7340e6bde142287b0a87211581a64379f3085eb8d653211
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'Kennedy center honors 2017 performances'. The presence of numerous external links, including one to 'traffnew.ru', points towards a phishing or SEO manipulation tactic. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

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 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://traffnew.ru/aws?utm_term=kennedy+center+honors+2017+performances PDF link annotation
    • https://site-1171722.mozfiles.com/files/1171722/star_wars_lightsaber_color_meaning_yellow.pdfIn PDF document text
    • https://wefekexuse.weebly.com/uploads/1/3/4/6/134685634/45da8.pdfIn PDF document text
    • https://tuwavufubuxa.weebly.com/uploads/1/3/3/9/133997694/5286670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418590/normal_5fb6848613d4c.pdfIn PDF document text
    • https://cdn.sqhk.co/munemuzabuk/hehFHif/jigosikuzoz.pdfIn PDF document text
    • https://site-1178965.mozfiles.com/files/1178965/95650132109.pdfIn PDF document text
    • https://site-1171373.mozfiles.com/files/1171373/43565216894.pdfIn PDF document text
    • https://site-1166598.mozfiles.com/files/1166598/pompa_sodio_potassio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_5fb340dca4e4d.pdfIn PDF document text
    • https://site-1172860.mozfiles.com/files/1172860/72998012987.pdfIn PDF document text
    • https://site-1179601.mozfiles.com/files/1179601/ge_universal_remote_control_codes_for_element_tv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417814/normal_5f95e6c06f5ae.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/miwolezedubujoz/chrome_failed_blocked.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE159 5580 bytes
SHA-256: 06dfc22170c0138280615b2ad104aa74e7cbf850503bdb6214139740e9e67589
font_01_sfnt_off0000f42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42D 11164 bytes
SHA-256: 0e4a46856a698277fe6ea2dea841ab5afea3d3255fe9faf1f74c5bc0b84a4c26
font_02_sfnt_off00011952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11952 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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