Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91e5d30c774a720…

MALICIOUS

PDF

78.8 KB Created: 2021-03-30 07:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: feec3670a4233891591086659386780c SHA-1: dfcf1d32b6d227313743d481d50511dab4d0bc95 SHA-256: a91e5d30c774a7204d5e07ddb82dfca802b94fe04c871df51b4bd392578f631a
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including an ML classifier and ClamAV. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document's content is designed to trick users with promises of prizes or funds, a common phishing tactic. An external URI pointing to 'jumiwimov.ru' was extracted, suggesting a potential command and control or phishing destination. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jumiwimov.ru/award?keyword=concurrent+programming+in+java+pdf
    • http://raxejudesezix.scienceontheweb.net/millennials_meme.pdf
    • http://towibukawit.22web.org/barcelona_metro_map_2017.pdf
    • http://tozonofer.iblogger.org/sahih_muslim_sharif_in_urdu_free_download.pdf
    • http://lafowesezojo.scienceontheweb.net/vagonejevisofejajexopuz.pdf
    • http://kubosikavudux.mygamesonline.org/bonuzapalawafirapane.pdf
    • http://kunujunekedi.mygamesonline.org/3771947141.pdf
    • http://tojuvapemupo.mywebcommunity.org/dogosofanawofojukoxi.pdf
    • http://sumomubidisuwo.iblogger.org/luxar.pdf
    • http://pefiworawodud.mypressonline.com/zokir.pdf
    • http://difulomutanuv.iblogger.org/25805980031.pdf
    • http://kapovulup.mywebcommunity.org/12169645284.pdf
    • http://pisumuvate.sportsontheweb.net/49219231540.pdf
    • http://zebozewazogaso.scienceontheweb.net/amplificateur_oprationnel_cours.pdf
    • http://java67.comIf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gokujipavelidaz.rf.gd/14136594125.pdf
    • http://jofesosozofoso.epizy.com/96152206226.pdf
    • http://jukasuxoseki.atwebpages.com/anatomie_de_l_abdomen.pdf
    • http://kafagida.rf.gd/14270278541.pdf
    • http://vekamodadon.onlinewebshop.net/xitasilod.pdf
    • http://wudilegabe.epizy.com/misutoxudujaduxi.pdf
    • http://borinalujid.epizy.com/bunis.pdf
    • http://wusipoz.rf.gd/35049340778.pdf
    • http://javarevisited.blogspot.com
    • 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_off0000f689.bin
a11271996fe0bfed7665e61795144027a58c2eefc38049571e2caea3a415bc74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF689 5304 bytes
font_01_sfnt_off0001088e.bin
ff212355a5b70c948686027f7facd5713d8b332e720ac4692f2cc4cc4e291c11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 10828 bytes

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