Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07f69e9a4141bff…

MALICIOUS

PDF

82.3 KB Created: 2021-04-08 02:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fde888522fb20c9e4c1059c8488da74 SHA-1: 61d36c509d7fd838a50aba0506a53133d6fd58a1 SHA-256: f07f69e9a4141bff54454dc39716d8583324392924bb5c8e6161f2b9fd151732
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with 'http://kofojomumam.epizy.com/pebibuzopafog.pdf' being a primary example. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create SEO-optimized content that can serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/wix?keyword=william+and+mary+rowing+camp+2020
    • https://wubobuxidozexe.weebly.com/uploads/1/3/4/3/134322977/lonujawovifidoleku.pdf
    • http://jidapuxedepu.medianewsonline.com/34444780516.pdf
    • https://static.s123-cdn-static.com/uploads/4485930/normal_5ff0eb93cea27.pdf
    • https://cdn-cms.f-static.net/uploads/4424645/normal_604421b1d13f9.pdf
    • https://cdn-cms.f-static.net/uploads/4382197/normal_604d0cd66bf84.pdf
    • https://static.s123-cdn-static.com/uploads/4491927/normal_5ff135b8cf9bb.pdf
    • https://gazuxupoje.weebly.com/uploads/1/3/4/1/134108966/najik_tirofu_jilirojotireti_webitutesigun.pdf
    • https://lulakoxefinadi.weebly.com/uploads/1/3/4/3/134332070/1fad908.pdf
    • https://xasopivuzag.weebly.com/uploads/1/3/5/3/135333163/6577274.pdf
    • http://juxeribitu.iblogger.org/bixatalolejazibinonebeke.pdf
    • https://mewuvirinikupu.weebly.com/uploads/1/3/4/5/134505229/tanudo.pdf
    • http://xoxosedefoxadu.mygamesonline.org/gasifikasi_biomassa.pdf
    • https://cdn-cms.f-static.net/uploads/4376612/normal_605faeb25355f.pdf
    • http://gatofupimekow.mywebcommunity.org/50085916691.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kofojomumam.epizy.com/pebibuzopafog.pdf
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_31179fa009ba480dbae152dc92f6b852.pdf?index=true
    • http://wuxojawe.epizy.com/topezolatas.pdf
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_5d83ba58b6ce4efe80139fbccb0182ca.pdf?index=true
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_e71354191d7640eaad019dc0b3c8d2a4.pdf?index=true
    • http://dotofosamoge.rf.gd/what_are_three_reasons_the_renaissance_began_in_italy.pdf
    • http://zoxarulal.rf.gd/ldr_sensor_module_datasheet.pdf
    • https://ae40ec61-d20a-40a8-9c94-208d4569f534.filesusr.com/ugd/5d0862_e9cd6e37d6354e788ce50cb9d9242357.pdf?index=true
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_18185a048f8e44c3a6ebe4ebd8e11d35.pdf?index=true
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_93f49c9f79544188bf59fba483652ab9.pdf?index=true
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_55e8420343284cfaa02feab4f88a4ddb.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
    • 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_off0000e983.bin
22cfb9faa16a893205cd676fa1603729df3fa01e383eeaf77350864c6c2b814d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE983 5696 bytes
font_01_sfnt_off0000fcfc.bin
0f4bca39337493acc87cca0b37068b13218b9bbc484f9b5aeee3c5db4c48bd5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFC 11412 bytes
font_02_sfnt_off0001245b.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1245B 16204 bytes

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