Malicious PDF — malware analysis report

Static analysis result for SHA-256 433a7590f84f7309…

MALICIOUS

PDF

101.1 KB Created: 2021-05-28 09:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bd5d706f10120c72cd7744fcef3b78f SHA-1: f115290be991b9313248ed4a2ccccc1fd59e4605 SHA-256: 433a7590f84f730914c0430377b1d668109a84c0d2189ca6f0872b29348536f8
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially garbled, suggests a lure related to 'Barbie movies' to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/strik?utm_term=lista+de+todas+las+peliculas+de+barbie+completas+en+espa%25C3%25B1ol+latino
    • https://nosodawef.weebly.com/uploads/1/3/4/6/134693330/7941753.pdf
    • https://fuloronarenor.weebly.com/uploads/1/3/4/8/134880411/b381a6b.pdf
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/nikatoroni_xuter_motesofewifof.pdf
    • https://zoredufuno.weebly.com/uploads/1/3/4/6/134638801/kadadokerasuvan_jozabejus_baxoxanerezadud_ninewuputagepon.pdf
    • https://fatofexar.weebly.com/uploads/1/3/4/6/134687548/minuwefeligat_wupiduxe.pdf
    • https://savipamezixu.weebly.com/uploads/1/3/4/6/134673646/fukixudaratab-luvogaribej-juzepod.pdf
    • https://wuselusovofose.weebly.com/uploads/1/3/1/1/131164562/404b597.pdf
    • https://raketesi.weebly.com/uploads/1/3/4/6/134632322/kenedudef-wopaxilirajurab-bijimimebibo-topejuzijojawog.pdf
    • https://vapukikavo.weebly.com/uploads/1/3/4/8/134886740/3641278.pdf
    • https://xulijuba.weebly.com/uploads/1/3/1/1/131164032/3761685.pdf
    • https://sifirugosiwoxam.weebly.com/uploads/1/3/1/3/131384024/wemonug.pdf
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/4212700.pdf
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/19d98ddb.pdf
    • https://kedifekutijita.weebly.com/uploads/1/3/4/7/134713117/jorofiripu-xebefofefabuzot-keketemudinute-didadaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/20d0f536-f26b-4a35-8942-02673cf71190/jozafiwusadebigawotose.pdf
    • https://uploads.strikinglycdn.com/files/078c289f-8517-4396-8755-72a2c2937f89/pureguardian_humidifier_clean.pdf
    • https://uploads.strikinglycdn.com/files/b17574dc-e9b1-45ab-a92b-8fe1652ebc43/perusosewomumape.pdf
    • https://uploads.strikinglycdn.com/files/f475a224-cb71-4d63-9e59-68f8a3d80c33/14382065471.pdf
    • https://uploads.strikinglycdn.com/files/0698732f-07cb-47c1-920b-a2c4def923ca/how_to_unclog_a_mobile_home_kitchen_sink.pdf
    • https://uploads.strikinglycdn.com/files/21fb2ba8-e79a-48e7-804c-daef26bb4fb0/musuzujagobaxu.pdf
    • https://uploads.strikinglycdn.com/files/5adc77d3-288e-44e6-96a6-fe2c906a3844/break_even_analysis_example_problems_solutions.pdf
    • https://uploads.strikinglycdn.com/files/864e6bb9-2d5d-4421-83ab-c45c918e7d1c/fetuwatavene.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_off00013b2e.bin
dab6bd427720c3498f2fdb9c26f9229979a3ddb4e732177f4a4a45dcae36a673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2E 5392 bytes
font_01_sfnt_off00014d14.bin
3b50578e40f7175242e7565b365ac987ad9532c0222f7346fa112d6bbc265a16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D14 12532 bytes
font_02_sfnt_off00017551.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17551 4324 bytes

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