Malicious PDF — malware analysis report

Static analysis result for SHA-256 3694ce37e3319a9c…

MALICIOUS

PDF

75.8 KB Created: 2021-03-12 01:03:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 153cd6dff6694e962100ab053897bd5a SHA-1: 9313e005d1e29e7ad825b9316655769ec214472b SHA-256: 3694ce37e3319a9c718f872e2de61ea2e2158a957cc5767d70607a669ed63cd5
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the presence of numerous external URLs points towards a phishing or content-farming attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 4

  • 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.
  • 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://botokaw.ru/123?utm_term=apr+audi+performance+racing
    • https://static.s123-cdn-static.com/uploads/4408177/normal_6002e316dd10b.pdf
    • https://cdn.sqhk.co/xadakede/gaPDlUo/upcoming_fighting_games_2019.pdf
    • https://cdn-cms.f-static.net/uploads/4488574/normal_6012426166872.pdf
    • https://static.s123-cdn-static.com/uploads/4415946/normal_5ffa9c453984d.pdf
    • https://cdn.sqhk.co/bedimiwojam/gXuZltw/zigezirumo.pdf
    • https://static.s123-cdn-static.com/uploads/4409798/normal_5fc714d438f4f.pdf
    • https://jikesisepam.weebly.com/uploads/1/3/1/4/131406861/f2f007a3.pdf
    • https://cdn.sqhk.co/wazafepel/hiAXieE/lufokepixij.pdf
    • https://cdn-cms.f-static.net/uploads/4382638/normal_6036512e7c3dd.pdf
    • https://cdn-cms.f-static.net/uploads/4457862/normal_60314cdae21aa.pdf
    • https://cdn-cms.f-static.net/uploads/4415944/normal_602a367f4a470.pdf
    • https://cdn.sqhk.co/zoburawava/aibjeia/car_x_drift_racing_online_pc_mods.pdf
    • https://wobipogipexiwom.weebly.com/uploads/1/3/1/0/131070125/1340867.pdf
    • https://static.s123-cdn-static.com/uploads/4485443/normal_5fca4a4e78391.pdf
    • https://jegetujo.weebly.com/uploads/1/3/5/3/135300600/7e0b796a.pdf
    • https://cdn-cms.f-static.net/uploads/4470218/normal_6040d8e7e44cd.pdf
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/8818575.pdf
    • https://jorevubo.weebly.com/uploads/1/3/4/8/134869484/7564952.pdf
    • https://cdn-cms.f-static.net/uploads/4411681/normal_60485eb9cbe9b.pdf
    • https://cdn.sqhk.co/tajudozizif/XgfS9jc/hungry_shark_evolution_hack_ios_2017.pdf
    • https://static.s123-cdn-static.com/uploads/4388835/normal_5fe259c0a5069.pdf
    • https://cdn-cms.f-static.net/uploads/4413019/normal_60262f8054c8f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jitimesolagun/disgusted_tom_meme_template.pdf
    • https://s3.amazonaws.com/rovikibixu/kuvubofasinozolasaxu.pdf
    • https://s3.amazonaws.com/nezanurugega/74469843364.pdf
    • https://s3.amazonaws.com/somisilegex/54968152218.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_off0000e9f7.bin
916b19fbdc96e715a3af729d93535989c2b1b4dd471095fbedd6a59e377675bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F7 5256 bytes
font_01_sfnt_off0000fbca.bin
8e6c4f60cba68fbc81c5c1baf7f4d6f34df337e1c74da975b153cc6df9805b44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCA 11380 bytes

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