Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fc5bd3937558e6…

MALICIOUS

PDF

84.0 KB Created: 2021-04-02 19:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a3b691c71223839409f033c5109fb69 SHA-1: a1f2bed35f39c601698fb0b98ae3b8d074abf5a2 SHA-256: 62fc5bd3937558e6a6509d7cfdc67cd3eb5402cdcaf2dd8cb9ff31a247b0fdb8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL being `https://soxebez.ru/strik?utm_term=alcatel+one+touch+idol+3+spare+parts`. This suggests the document's primary purpose is to redirect users to potentially malicious or spammy websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://soxebez.ru/strik?utm_term=alcatel+one+touch+idol+3+spare+parts
    • http://e-devletodeme.net/viluguvogrjd.pdf
    • https://cdn-cms.f-static.net/uploads/4384642/normal_60524e64e0c98.pdf
    • http://openlait.pro/79866683003l3c59.pdf
    • https://cdn.sqhk.co/texivewa/a8tyBih/steven_games_piano_tiles_2.pdf
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/fajalorupuvadamo.pdf
    • http://bullbananavannaone.xyz/air_force_1_high_top_womens_foot_lockerklenp.pdf
    • https://static.s123-cdn-static.com/uploads/4443344/normal_5fdfa23ea8ad6.pdf
    • https://jeboxuxu.weebly.com/uploads/1/3/2/7/132710743/lapevafesaji_vazakiji_kosiluj_mijurid.pdf
    • https://lapaluletegole.weebly.com/uploads/1/3/4/6/134679291/mazofi.pdf
    • http://tugrull.com/masterbuilt_electric_smoker_boneless_turkey_breast_recipesji0bi.pdf
    • https://cdn.sqhk.co/pibegufuxova/jf7ihgh/15128132367.pdf
    • https://static.s123-cdn-static.com/uploads/4450634/normal_6005d1824c88d.pdf
    • https://cdn.sqhk.co/venitalobeni/jbA4SOr/33711720573.pdf
    • https://cdn-cms.f-static.net/uploads/4407733/normal_600a84b5293e5.pdf
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/poradufozabasifu.pdf
    • https://cdn.sqhk.co/zimopiroxab/yXDhiih/angry_birds_transformers_jenga_code_free.pdf
    • https://cdn.sqhk.co/jikikavadaja/geja9oo/mewinipekidasazi.pdf
    • https://mizunemaki.weebly.com/uploads/1/3/4/8/134850414/felan_jesejuverojo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_ad822d7f8c2f4fcd8a9f48b39b16cb54.pdf?index=true
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_af55fe01a6254b138164bb5e523e8d87.pdf?index=true
    • https://c4fca8c4-0f54-45c3-ae88-320069d86c16.filesusr.com/ugd/ac0d21_40302f7b43e24b9490def643025c0696.pdf?index=true
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_7ae2f445333b42e48f53bcea2299e670.pdf?index=true
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_3732d73371304cd3927e63c5fca5eb5a.pdf?index=true
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_c12b009a90464e0cb18a35b285ab5456.pdf?index=true
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_64a8e976754e4345be4f15a6c4ca8bcb.pdf?index=true
    • 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_off0000f711.bin
844f9e627b5790e8defb6956b8efff2004dfbeeea7bab9fe6a32dfdca0acaa00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF711 5196 bytes
font_01_sfnt_off000108a5.bin
a5802a6360e60ec058860ee90dcfb1eb0d6ccc9ad7a443eabae5394bf235a1ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A5 12252 bytes
font_02_sfnt_off00013243.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13243 4324 bytes

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