Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00ee1e5036b70a3…

MALICIOUS

PDF

80.7 KB Created: 2021-01-24 10:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3cb20bbb66606dc95f207fe3112afe42 SHA-1: 0029cf8bcc75d9cb6c682ea1fbf2858741361ec9 SHA-256: e00ee1e5036b70a3e5632442f5d39501e0851dbe4ff1cdb87e8cf24c65b3b4c8
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous external links, including one pointing to 'trafffi.ru', suggesting a phishing or redirection attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates the PDF is part of a link farm, further supporting a malicious intent to drive traffic to external sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/aws?utm_term=bsnl+maharashtra+intranet+form+16 PDF link annotation
    • https://site-1168513.mozfiles.com/files/1168513/save_the_mother_earth_quotes.pdfIn PDF document text
    • https://site-1254694.mozfiles.com/files/1254694/polygon_shapes_worksheets_grade_3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420592/normal_6006465bbcd32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413867/normal_5ffaa5e56f9ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372980/normal_5fc603dfcc764.pdfIn PDF document text
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/kibigasefukod_jujaku.pdfIn PDF document text
    • https://site-1234635.mozfiles.com/files/1234635/residence_of_evil_vigil_pc.pdfIn PDF document text
    • https://lijoliwaxodoxi.weebly.com/uploads/1/3/1/3/131398144/61034.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
    • https://s3.amazonaws.com/tedowafomaru/90748392680.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/rajesh_cherthala_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/sans_cyber_security_policy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/diminishing_value_depreciation_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/blackberry_bold_9700_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/goxegebikazavapog.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/78248326354.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/wivojegidowajilaturef.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_off0000ea11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA11 5260 bytes
SHA-256: d9bbc7f463cae2ee92166c7062485dc68cd8214fd5375c56ec968814b4991687
font_01_sfnt_off0000fbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCC 11152 bytes
SHA-256: 978c8a281eefde768b5bed60479b666ce875ed40690ebea74d7e9aa2155c54f6
font_02_sfnt_off0001221f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221F 5236 bytes
SHA-256: 36638492c54027a58ae802c9cddc5672aa9a28a582c744b8ece186d2ec629e06

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