Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a16782a3de3ebf…

MALICIOUS

PDF

65.9 KB Created: 2021-03-11 06:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1059e73588393b968b1f9995cffdcf5 SHA-1: dc6437f4f0343f0fcaadaf43abdd6c9f53719b4a SHA-256: c1a16782a3de3ebf227261fe68144606bfe4abc31af3caa7edeacefbe4a22647
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'baarspo.ru', which is likely used to host a malicious payload or redirect to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit vulnerabilities or trick the user into navigating to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=noritz+rc-7649m+remote+controller+manual
    • http://kikudesazogug.22web.org/ey_insurtech_australia_report.pdf
    • http://dalurekawo.iblogger.org/sexeruxukesinokuzonu.pdf
    • http://kulokozataxat.22web.org/pencil_calligraphy_worksheets.pdf
    • http://kemamibuke.mygamesonline.org/ludete.pdf
    • http://gagitevanonuti.mywebcommunity.org/fonobizipajob.pdf
    • http://waranijovuv.sportsontheweb.net/mother_courage_as_a_specimen_of_epic_theatre.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vilijakuji.epizy.com/80446712344.pdf
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_03924874304646549e21528e64c4bf06.pdf?index=true
    • https://s3.amazonaws.com/pulujolatepuv/neguxipewami.pdf
    • http://tujijekaxevon.rf.gd/xivavujitoveretuwe.pdf
    • https://s3.amazonaws.com/nakuzafol/beats_audio_driver.pdf
    • http://rabuxudizuxu.epizy.com/tumikekemiloviruvitomop.pdf
    • https://s3.amazonaws.com/fowonaxul/10769105285.pdf
    • http://powipuwefitori.rf.gd/wifey_judy_blume_amazon.pdf
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_a2bd7e600e694126bacd59f67c633cb8.pdf?index=true
    • http://lusiromipu.epizy.com/the_most_popular_song_on_youtube.pdf
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_fee7691243ae4521a2d8acfa579f8bdf.pdf?index=true
    • http://zubugawopi.rf.gd/sazidovuxusasemijipiman.pdf
    • https://s3.amazonaws.com/gimufesajo/mujer_que_ora_por_su_esposo.pdf
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_88268d3d84d2467783cc4eaeeee9620e.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c404.bin
b55b08bb9f5b39e54407a13479fec853bc590953401148b0c0e504b643d9d03a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC404 5296 bytes
font_01_sfnt_off0000d615.bin
260af087dc758a2019b01fd16959c329227d9ae7327da9d9e06ca343f843755b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD615 10616 bytes

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