Malicious PDF — malware analysis report

Static analysis result for SHA-256 469fe2c99a62bdfe…

MALICIOUS

PDF

77.4 KB Created: 2021-03-23 20:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 865341b3a9f83c4bcba48f6b45deb1ef SHA-1: d6ac5fc34dd491531b5f9a946c3d2bab35d307f1 SHA-256: 469fe2c99a62bdfe1d617e366f27d890e86a7d70f216eec6c441e3f57e73fdd6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or SEO spam campaign designed to drive traffic to potentially malicious or phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users, aligning with phishing or malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://leonvi.ru/aws?utm_term=how+to+pair+remote+to+cable+box
    • http://zaximudetebase.iblogger.org/convert_150_pcf_to_kn_m3.pdf
    • http://crystal-light33.ru/diccionario_visual_en_ingles_oxfordkg271.pdf
    • https://deremorukoj.weebly.com/uploads/1/3/4/4/134490203/mugidese.pdf
    • https://cdn.sqhk.co/pixefavenar/jbgZjd0/ririnejizufojuda.pdf
    • https://piminuwimizo.weebly.com/uploads/1/3/4/6/134674326/4bc844888643.pdf
    • https://cdn.sqhk.co/lebapivi/ZMr9Cjc/border_patrol_agent_death_2020.pdf
    • http://uabiomanix.xyz/60297351800au6uj.pdf
    • https://fopozawiluni.weebly.com/uploads/1/3/4/3/134383369/aa4cbbd.pdf
    • https://cdn.sqhk.co/minutakumu/lYhiieY/battle_royale_games_non.pdf
    • https://kurotasa.weebly.com/uploads/1/3/4/4/134494220/5152764.pdf
    • http://reduslim-italia.website/baofeng_uv-5r_programming_software_windows_xp9u39g.pdf
    • https://malufatagu.weebly.com/uploads/1/3/0/8/130874424/5695617.pdf
    • https://telidububiz.weebly.com/uploads/1/3/1/4/131452987/tomufedad-majivibalegimid.pdf
    • https://cdn.sqhk.co/fafujedajir/iiidgdM/frontline_vessel_attack.pdf
    • https://cdn.sqhk.co/lisesemafo/b5Wxjif/mijopazipegujisamofeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jozubukobuwaju.epizy.com/basil_pesto_sauce_nutritional_information.pdf
    • http://japotegalavig.epizy.com/64815450161.pdf
    • http://topufopotu.epizy.com/22522038569.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ee.bin
e3b350c328ee1a8317734ae4238ca53d70b0162e94e693b07eff38a0205bf1ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EE 4844 bytes
font_01_sfnt_off0000f473.bin
bdd52d01d1b5f199d3f9b7d28a8ae2515329a60ad214acb6148f74e5c0157b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 10936 bytes
font_02_sfnt_off00011a10.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A10 4324 bytes

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