Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c07e8e76980c150…

MALICIOUS

PDF

83.7 KB Created: 2021-03-19 09:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60cb51c6f39202eabab48ee541ea5d0d SHA-1: 235ecce6216ceb44830c3894751e4bcbf7ead15f SHA-256: 7c07e8e76980c1505c60a06c8eb3331daa6c7a617c1c62bd1c02f6ee45a2ada5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=autonics+catalogo+pdf
    • https://gijagexerifaru.weebly.com/uploads/1/3/5/3/135322880/mukegobaxolelow.pdf
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5fd658626f062.pdf
    • https://cdn-cms.f-static.net/uploads/4374203/normal_604621ae74941.pdf
    • http://pepirizibizedel.22web.org/97792578488.pdf
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/bidozokuraze.pdf
    • http://vixeledujaj.iblogger.org/79275083964.pdf
    • https://cdn-cms.f-static.net/uploads/4374181/normal_5fe65e7d1bf57.pdf
    • https://kulaxebide.weebly.com/uploads/1/3/2/3/132302774/rurupenigaleb.pdf
    • https://febumade.weebly.com/uploads/1/3/4/7/134757335/lamepeni.pdf
    • https://cdn-cms.f-static.net/uploads/4484355/normal_602060b2828bb.pdf
    • https://gibexiwufanoti.weebly.com/uploads/1/3/6/0/136099712/febujobigapev_fizezaxifozaxi_dujebor_vufoxo.pdf
    • https://cdn-cms.f-static.net/uploads/4486745/normal_602194f39f988.pdf
    • https://bewirupudafa.weebly.com/uploads/1/3/1/6/131607000/zemudukase.pdf
    • https://jarupaxalimex.weebly.com/uploads/1/3/5/3/135324443/govuxinamakijen_wipow_favedube_vavudusopuvunuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gazinopalevigem.rf.gd/34337678906.pdf
    • https://s3.amazonaws.com/voxazedisula/73598758381.pdf
    • https://s3.amazonaws.com/zidenigad/27164428142.pdf
    • https://s3.amazonaws.com/jojitagifuva/android_offline_football_games_free.pdf
    • https://s3.amazonaws.com/zulezov/how_many_calories_are_in_a_small_sonic_blast.pdf
    • http://vuriruzuminomu.epizy.com/58333063516.pdf
    • https://s3.amazonaws.com/vezumobigodub/android_17_vs_18.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
    • 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_off0000f112.bin
2285a64fb46b0ad742b9dc5df3b3772aa219d8d15997d9f94ac0d14b86884628		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF112 5216 bytes
font_01_sfnt_off000102ee.bin
08ebb685d49cf3b5bd84f5178fea8fd0f861f0692b2dc8df1637975a1ba217b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102EE 12576 bytes
font_02_sfnt_off00012c2b.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2B 16204 bytes

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