Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c54592c7504fb9…

MALICIOUS

PDF

74.4 KB Created: 2021-01-10 20:38:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ecdf694dd901a3e86566033e41a1b52 SHA-1: e42a0743a89eae66e54184e51db8e7fd7450a0de SHA-256: 23c54592c7504fb9139ff00c4c51cca8a0bfb0ec0cd720ccfe39a0dc8435d043
222 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including links to known malicious redirector infrastructure and a large number of links to external PDF files, suggesting a link farm or SEO abuse. The presence of a 'download button' heuristic further supports a deceptive download lure. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a phishing or malware distribution attempt, likely via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/123?utm_term=future+fight+mod+apk
    • https://dozumudokasalog.weebly.com/uploads/1/3/4/9/134902229/rebuf-rolit.pdf
    • https://cdn.sqhk.co/zatejurix/xRgimgh/91442367861.pdf
    • https://site-1172079.mozfiles.com/files/1172079/wejolosijuz.pdf
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f870e0fd62fa.pdf
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/rupaponagiguju-jelapepila-goxowepunepa-lekodat.pdf
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/tibot.pdf
    • https://kiwosetivugo.weebly.com/uploads/1/3/0/8/130874254/5947857.pdf
    • https://cdn.sqhk.co/rosomugimo/ihicVoo/tractor_pull_2020_schedule.pdf
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/1304421.pdf
    • https://site-1245113.mozfiles.com/files/1245113/21060841364.pdf
    • https://cdn.sqhk.co/pawosuku/hgEhbge/life_of_prophet_muhammad_pbuh_audio_mp3.pdf
    • https://cdn.sqhk.co/dufukeraj/nieYhhd/the_maxx_comic_book_1_value.pdf
    • https://cdn.sqhk.co/sivefuxonix/b3whijf/bukodurusezivatozorusivun.pdf
    • https://cdn.sqhk.co/menigopas/id7ijZo/34294596320.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mejados/46586121654.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_off0000e5df.bin
87ea16b48796771aa05e219720ae28c6b6280479fd7a55050af9e96e7450e396		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DF 5264 bytes
font_01_sfnt_off0000f7a0.bin
62791ec1d611db98caf224e8de4bb8506888776bf697ae6b7f784999a6ac4c79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A0 10872 bytes

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