Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f05fe7f0380d95…

MALICIOUS

PDF

70.7 KB Created: 2021-03-16 12:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 965a6836651944246ce3e6dba3000be6 SHA-1: 5beb7fd8baae90ea9c5712c01354cdcac9e565c3 SHA-256: c3f05fe7f0380d959901e75930e01bacff0873c2d30dc31413ec1aa3c32bd8df
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/wix?keyword=toshiba+carrier+remote+control+manual PDF link annotation
    • https://ninobajoxakatud.weebly.com/uploads/1/3/4/7/134702009/potarenibiruj.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/htDha7v/white_gallery_wall_frames_canada.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/wuxem.pdfIn PDF document text
    • https://govoxarenaja.weebly.com/uploads/1/3/4/8/134874143/rimuf.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/eTMhgia/zombie_pandemic_similar_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467286/normal_6038b802ebafe.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/fjQgjgj/11315104303.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/aI8hhje/dijum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5ff3651a77a6b.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/gchfjjd/4_pics_1_word_level_1100_to_1200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_602af14421884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471083/normal_600c0493f2929.pdfIn PDF document text
    • https://ritukananikunid.weebly.com/uploads/1/3/0/9/130969552/53b595c38698f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380070/normal_603bc48945df1.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/4hijhnR/wupagisipakabizizepigot.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/dQCigia/tuning_fork_definition_medical.pdfIn PDF document text
    • https://wimukevefom.weebly.com/uploads/1/3/0/7/130739067/tomonu.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/fobupojowojon/gafezusuwal.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/24692903095.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/ansi_c_standard.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/dp_animation_maker_4._3._1.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/97971051868.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/57688565539.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/53775480935.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/89330291475.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD896 5128 bytes
SHA-256: 38a2a7ab7116f6939c3030f5ac17e00aa77f00d648d350382ee4cc568196e6c1
font_01_sfnt_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 10352 bytes
SHA-256: 925e328997ebca3e1e80809b1f690dcd527f6debac5895deba7385a6110b71df

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