Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7a4308638614fe…

MALICIOUS

PDF

84.2 KB Created: 2021-03-13 23:35:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15646a7dc14461715673ac6c4136fa4f SHA-1: bc256ef7f13da1be1f5e8f541d529fb8f2a85103 SHA-256: ab7a4308638614fe341b71bba6af44d07bc91f43eeff522bcbcdaffa4ad38c47
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detected it as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 4

  • 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://midufefew.ru/award?keyword=business+model+navigator+book+pdf
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/7253091.pdf
    • https://torewofatovamek.weebly.com/uploads/1/3/4/1/134108613/remakijalodaleje.pdf
    • http://goodshopsales.xyz/discussion_questions_iron_jawed_angertqjw.pdf
    • https://vumimexuderuwaz.weebly.com/uploads/1/3/1/8/131871863/9660812.pdf
    • https://static.s123-cdn-static.com/uploads/4471948/normal_5ff636e70e4ae.pdf
    • http://figupatofewox.iblogger.org/69568689433.pdf
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/marijaji_jozivojo.pdf
    • https://static.s123-cdn-static.com/uploads/4426810/normal_5fddbd03b7031.pdf
    • https://cdn-cms.f-static.net/uploads/4417662/normal_603dc38a60a00.pdf
    • https://xinuxarovota.weebly.com/uploads/1/3/0/7/130776268/1070618.pdf
    • http://boxberry-24.cc/568770921460fxpm.pdf
    • http://save50it.info/mubedinogugaxoxgtawh.pdf
    • http://instas.site/99367783142w3wej.pdf
    • https://nazumuliwoj.weebly.com/uploads/1/3/1/3/131383416/tuneluleko.pdf
    • https://fazolusafiwef.weebly.com/uploads/1/3/4/5/134585025/b08589.pdf
    • http://wesused.22web.org/how_to_reset_westell_7500_router.pdf
    • https://sotugipuzelaj.weebly.com/uploads/1/3/0/7/130738723/zunuwalefe-fizilelogusov-gokisiz-gazoz.pdf
    • http://biotringel.shop/yeastar_s20_datasheetkkkjr.pdf
    • https://static.s123-cdn-static.com/uploads/4480580/normal_5fe50eb200500.pdf
    • https://babexunerasosib.weebly.com/uploads/1/3/4/6/134620176/nidubigowu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sewasijibakel.epizy.com/mevona.pdf
    • http://watekiz.rf.gd/what_are_high_tension_classical_guitar_strings.pdf
    • http://zusewijoje.epizy.com/15429843340.pdf
    • http://wulukexererumus.epizy.com/25919083145.pdf
    • http://gubazit.epizy.com/algebraic_expression.pdf
    • http://zarufutebere.epizy.com/rainbow_fish_species.pdf
    • http://tafupudininidag.rf.gd/wugibowoviporit.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_off000108e8.bin
6c7bdd325124de84d3bb040443c7271cdebbd2955bf582cc8e088825e9f29725		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E8 5676 bytes
font_01_sfnt_off00011c2a.bin
ae9c924716cc00ed7e0c1b737e7a53aa90a0eee3b8b4fdc9fe283c21aa9d174d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2A 10876 bytes

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