Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f5feb3028ae38f…

MALICIOUS

PDF

82.4 KB Created: 2021-03-29 04:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a1824935b1384a8fab48e2410577757 SHA-1: 5b04605942991c9c56dda97abb0dad431de01d44 SHA-256: 93f5feb3028ae38fb7c48c8d08f1b2e43464989ef26d92714aa205357449b860
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, characteristic of a link farm or phishing campaign. The heuristic PDF_SEO_LINK_FARM and the presence of multiple unknown reputation URLs suggest an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/wix?keyword=wwe+2k15+apk+%252B+obb+file+free+download+for+android+devices
    • https://cdn-cms.f-static.net/uploads/4454049/normal_5fda437c77e4e.pdf
    • https://cdn-cms.f-static.net/uploads/4471099/normal_60563c682c801.pdf
    • https://xivimuwujaka.weebly.com/uploads/1/3/4/4/134440816/fasilugevi_risoxerujemik_zofovatodasewa.pdf
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5ffce00954a8f.pdf
    • https://cdn-cms.f-static.net/uploads/4497131/normal_6056928447ef0.pdf
    • https://mafinejolid.weebly.com/uploads/1/3/2/6/132683008/jijizivibuji.pdf
    • https://cdn.sqhk.co/mugejufunij/Fiahgib/oscar_wilde_movie_with_jude_law.pdf
    • https://static.s123-cdn-static.com/uploads/4471723/normal_600954fb0f7a9.pdf
    • https://cdn-cms.f-static.net/uploads/4452173/normal_601cc4f966219.pdf
    • https://jezasowafinam.weebly.com/uploads/1/3/4/5/134530254/20357b3943ce.pdf
    • https://zowukudikumo.weebly.com/uploads/1/3/1/3/131382828/7787525.pdf
    • https://cdn.sqhk.co/rurizibaxami/ijLM1ib/mufoliguwubosejozole.pdf
    • https://cdn-cms.f-static.net/uploads/4377377/normal_605ba94015376.pdf
    • https://cdn-cms.f-static.net/uploads/4375210/normal_6030446c688aa.pdf
    • https://cdn.sqhk.co/zapajugadira/jdieUje/baby_panda_s_bird_kingdom_pennsylvania.pdf
    • https://cdn.sqhk.co/mogilirexexa/jfQxhbK/xutikafisafiwoxanewi.pdf
    • https://cdn.sqhk.co/fojevimexu/mgeligy/soxegekakiv.pdf
    • https://cdn-cms.f-static.net/uploads/4466661/normal_60145ea7ed0df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sirilagewuga/26830265189.pdf
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_b006b98929e344b9a280784efcbf2b71.pdf?index=true
    • https://s3.amazonaws.com/jevelel/dorenivafasuruwosej.pdf
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_4c027c607766405db262627ade39216e.pdf?index=true
    • https://s3.amazonaws.com/winumigutam/what_is_a_strawman_argument_example.pdf
    • https://de2ee6d5-caaa-4265-b15c-40100ab77d99.filesusr.com/ugd/d43733_9f685d3e25694802a6f919e6562522f6.pdf?index=true
    • https://s3.amazonaws.com/vatosolikijike/xagiwevexafugigebetu.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_off00010170.bin
d6e4859a6f972b558d49c35e85560aa6ec985791ea5535a44e671e2a75486ed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10170 5824 bytes
font_01_sfnt_off0001157b.bin
8cfe7eefeca4898b5781559817fbb802d00b3796b4d98f053f97fd40ea942ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1157B 11260 bytes

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