Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ae15df924953f4…

MALICIOUS

PDF

69.7 KB Created: 2021-01-29 15:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00af183ac6233c5344f0e222c2fa92f8 SHA-1: 56f6e14df3b8fb1f61e4e2fca241e949a4b4b096 SHA-256: d1ae15df924953f44e5341f4bd01100cdbabc527c0397383746981d4e95f36ab
156 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating it is a phishing or malicious link farm, with a high ML classifier score and ClamAV detection. The embedded URLs, particularly 'https://maypoin.ru/wb?keyword=moy%202%20virtual%20pet%20game%20download', suggest a lure to download a game, likely a phishing or malware distribution attempt. The presence of numerous external links points towards a link farm strategy to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/wb?keyword=moy%202%20virtual%20pet%20game%20download PDF link annotation
    • http://apkweb.net/metegevekumobotezaxirewiyn3c7.pdfIn PDF document text
    • https://nizodori.weebly.com/uploads/1/3/4/0/134000204/bdfd2509944.pdfIn PDF document text
    • http://wevoselaxoto.66ghz.com/72870462024.pdfIn PDF document text
    • https://cdn.sqhk.co/wisivelu/aLokCUq/61397243723.pdfIn PDF document text
    • https://cdn.sqhk.co/businaxidare/9idjdFP/9574778037.pdfIn PDF document text
    • https://vigagexagadip.weebly.com/uploads/1/3/1/8/131856194/fixebesomiweteter.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/hfhehjW/jepavotolixurosogenena.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/jY7hh8e/puxejatonuwapobivopa.pdfIn PDF document text
    • http://ostanni.fun/misinagyvd60.pdfIn PDF document text
    • https://cdn.sqhk.co/mozejipakas/GRyOjjz/strategic_management_concepts_competitiveness_and_globalization_test_bank.pdfIn PDF document text
    • https://lavidibiw.weebly.com/uploads/1/3/4/5/134582964/5536443.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/exponent_rules_mixed_practice_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/functional_specification_template_for_mobile_application.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/juwagitadinejukufudises.pdfIn PDF document text
    • http://dexixikix.epizy.com/bejeweled_blitz_free_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/domine_las_aperturas_de_ajedrez.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/farapibaze.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC374 5492 bytes
SHA-256: 5ed7f857371055d25ead0e5d9c58dcfc3af820a00fb3c08489848749d013bfba
font_01_sfnt_off0000d62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62E 3484 bytes
SHA-256: ec4b2ca5634e1f563cfe1b118f4da73cb993c30285f1b21539245732f1252a59
font_02_sfnt_off0000e393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE393 11084 bytes
SHA-256: 51aed0750373ef47fd3193520ea8df7a2017b34b284204d71f8d53119840f791

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