Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e05f013745166ce…

MALICIOUS

PDF

104.8 KB Created: 2021-03-04 06:06:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63de139627bfd79ebbbe6780f563b001 SHA-1: 77475b8eb3888705e40d1064c365de4d8ddd219b SHA-256: 3e05f013745166ce63de809c6b1c316e5420287b5acee9b5d0564ff24ab47d4a
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 by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on external domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these linked documents. No scripts were extracted, but the structure suggests a link farm designed to redirect users to potentially harmful content.

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-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://seumenha.ru/123?utm_term=where+do+mandalas+originate+from
    • https://dizogesutupini.weebly.com/uploads/1/3/4/6/134631076/dobepidu_nodasafab_nerukurofujug.pdf
    • https://cdn.sqhk.co/tajudozizif/igdhahi/ganotejusiguviwikogudifiw.pdf
    • https://cdn.sqhk.co/wozejodes/aQmifzU/16760671843.pdf
    • https://cdn.sqhk.co/zatovafer/dDwd5rW/31211065577.pdf
    • https://cdn.sqhk.co/zufuxirap/gghcAu9/chennai_super_kings_2015_squad.pdf
    • https://cdn.sqhk.co/dekavaka/Fgc6Jjb/54902467961.pdf
    • http://bikejesoxatelo.mygamesonline.org/wofolufimapana.pdf
    • https://cdn-cms.f-static.net/uploads/4476126/normal_6032642668ae3.pdf
    • http://fogafiv.mypressonline.com/gajeduxesefinufaxob.pdf
    • https://gileledera.weebly.com/uploads/1/3/0/8/130874536/nuwuzawobaw-xosigemixe-kifexebeja-xomiri.pdf
    • https://cdn.sqhk.co/pubodegosog/kjiiijg/stickman_battle_royale.pdf
    • https://cdn-cms.f-static.net/uploads/4455884/normal_602c8bd7e1d0a.pdf
    • https://static.s123-cdn-static.com/uploads/4489440/normal_5fe3a54467429.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rabatelekovufar.myartsonline.com/how_to_remove_a_moen_faucet_aerator_without_a_wrench.pdf
    • http://dagogedimin.rf.gd/74739535872.pdf
    • http://sidepojedava.myartsonline.com/el_caballero_de_la_armadura_oxidada_resumen_y_analisis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001411f.bin
8762587b890d00f64fc48c00b3ec26324823ae39951952bbed53bc717200b62a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1411F 7720 bytes
font_01_sfnt_off00015a82.bin
7994fc8f78b023c248e8a7eae8543d14440108428c2fc0dd1f7f822ebdec7ff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A82 5332 bytes
font_02_sfnt_off00016c83.bin
44d7f2ac92b7e447b7af780071bc8dfe4716b7a4ccf3690a18fb0ab99cce4ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C83 12828 bytes

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