Malicious PDF — malware analysis report

Static analysis result for SHA-256 572cfbd7f0d79f97…

MALICIOUS

PDF

72.8 KB Created: 2021-01-25 14:18:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 036888564b2b3806b0488209ed3f155a SHA-1: b19cf3a60c3c912deaa2c0ed99c14b0c8bb452fc SHA-256: 572cfbd7f0d79f97bad6929f33e0cc552484194d58e13454405d50bd7c373ddc
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful content. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics further support its malicious nature. While no scripts were extracted, the embedded URLs and the link farm structure indicate a likely phishing or malware distribution attempt, possibly using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://druttle.ru/aws?utm_term=mera+bhola+hai+bhandari++mr+jatt PDF link annotation
    • https://waxizeno.weebly.com/uploads/1/3/0/8/130814339/babatuf.pdfIn PDF document text
    • https://posolefuriw.weebly.com/uploads/1/3/4/3/134374222/382298.pdfIn PDF document text
    • https://cdn.sqhk.co/zupisopad/hhjcqrU/32156500551.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/59085.pdfIn PDF document text
    • https://rajuputodetu.weebly.com/uploads/1/3/4/6/134682309/5504b8.pdfIn PDF document text
    • http://jitokinut.iblogger.org/cercle_de_la_forme_cadet_programme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://fazafof.rf.gd/3243255095.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/posegidatobatogixivatok.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/chrome_linux_tar._gz.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/kuxofogubugefadu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/84522795583.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/45112325089.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/37533256148.pdfIn PDF document text
    • http://vatilibudavelit.rf.gd/lufajotiduk.pdfIn PDF document text
    • http://vogafaxusa.epizy.com/trademark_cease_and_desist_letter.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_off0000ce0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0F 5108 bytes
SHA-256: 7aa2cae3dd543b5667d01a1858ba5e92eed8dc05ee08d184575479549188ea0d
font_01_sfnt_off0000df45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF45 12032 bytes
SHA-256: 01efe951f2ea3a92aa6fe32a015052068a990d891dad5bc49371640f13475c9e
font_02_sfnt_off00010884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10884 3420 bytes
SHA-256: 6a2d2644e019e73455472400fe6285adbb5c1de80194782694a1c5db79df90e1

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