Malicious PDF — malware analysis report

Static analysis result for SHA-256 397f0563f028adde…

MALICIOUS

PDF

76.2 KB Created: 2021-05-21 08:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 98473eba0aa517464124df5a203f39df SHA-1: 5aab992c746935ca5b0a366f940a155c1d19e915 SHA-256: 397f0563f028adde312491581fa371e9e16a2b4660252ffddfac4c2c71eca02e
96 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free imvu credits' and embeds a URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://midufefew.ru/strik?utm_term=free+imvu+credits+2019+no+human+verification PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501193/normal_603d72c04c50b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_6041dc8ea9bd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_6041cb10313c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420031/normal_6025f7c5f278f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423452/normal_5fc95d150b239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_605d8abb56bdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474192/normal_600eafb26ee85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_6051af4b665ac.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/goneduzum/managing_social_anxiety_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/irobot_braava_jet_m6_black_friday.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/how_to_learn_scratch_coding.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/kirby_sentria_used_price.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/79030188146.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/romeo_and_juliet_2013_full_movie_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/my_mobile_hotspot_is_connected_to_laptop_but_no_internet_access.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/chinese_movie_er_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/channel_master_cm-9521a.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/16873155281.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/aldehydes_and_ketones_nomenclature_worksheet.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_off0000df55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF55 5724 bytes
SHA-256: 46deac8bfe4ce554b761985e7b1c2503ea421f725d21aaf26cf0ef414ea9d555
font_01_sfnt_off0000f2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A7 2400 bytes
SHA-256: d435bebdb9e580e7dea44a11b84e66b24ba2b586fdbdc659151bde4337d992ee
font_02_sfnt_off0000fd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD38 10580 bytes
SHA-256: a351c155dda62d8935cc8cdf7e11342ce74cce9ca9d7e52f1bc8544cf7081666

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