Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d089fde470309a…

MALICIOUS

PDF

85.8 KB Created: 2020-12-21 14:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebced522501761aab42f1d90ca55823b SHA-1: 744b0eaabf8cafc79a6d389bd919748fbf937828 SHA-256: a2d089fde470309aa707bbfb191530974ad6e7ac83067684ce20fc82a9c11419
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, many of which point to PDF files hosted on Weebly. The primary URL suggests a lure related to downloading PUBG Mobile. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or downloads. No scripts were extracted, but the PDF structure itself is used to host a link farm.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=pubg+mobile+metro+royale+download+apk+obb
    • https://gitikatul.weebly.com/uploads/1/3/4/7/134749175/52c00f92eee9ce.pdf
    • https://bevarolemi.weebly.com/uploads/1/3/4/6/134685224/172a7.pdf
    • https://zenovoruzunej.weebly.com/uploads/1/3/4/3/134339910/6331852.pdf
    • https://kixesikanunezez.weebly.com/uploads/1/3/4/7/134702505/6175272.pdf
    • https://sexiguviwuzokal.weebly.com/uploads/1/3/4/6/134687255/bikirijuleraj.pdf
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f8c442f50b17.pdf
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/5427261.pdf
    • https://static.s123-cdn-static.com/uploads/4469378/normal_5fdd8a8df216e.pdf
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5f8f1c5a96151.pdf
    • https://cdn-cms.f-static.net/uploads/4410462/normal_5fac2cb052dc6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc51a9dbe9b69395125fe2b/t/5fcabd2da0fc71057d13a28b/1607122222193/38404785477.pdf
    • https://s3.amazonaws.com/mixanaz/145091796.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1fe1d2806c62ec201ccc/1606229986159/dragon_bridge_skyrim.pdf
    • https://static1.squarespace.com/static/5fc18365f9866f3fd2d8aaf8/t/5fd0782a1c49363a9b4bb1f3/1607497772181/sniper_3d_assassin_shoot_to_kill_pc_trainer.pdf
    • https://s3.amazonaws.com/miwolezedubujoz/xogijim.pdf
    • https://static1.squarespace.com/static/5fdebfeb2dcd53187f206807/t/5fdf4683ef8e407a9ea1f88b/1608468099823/gojelorolemixifomeba.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf51d24f98375720d6fecf/1606373843649/xajoguse.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f61b.bin
e4d9a67b9b79e9b500057bd1447c99d347b9ce09dd4a3c0b6e6ef51c7b73ad01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF61B 5500 bytes
font_01_sfnt_off000108ce.bin
c4a34264d5e071c3697244a1403e1344ed84ee2fd8df3a198239b3e5797a885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108CE 14972 bytes
font_02_sfnt_off000134aa.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134AA 16092 bytes

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