Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fb42cbdfb6fc12…

MALICIOUS

PDF

71.8 KB Created: 2021-01-03 14:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f8b476d86068970cede096b7f84cb872 SHA-1: 729a578b9d99e517e9487567de18d17249d8fbd7 SHA-256: 47fb42cbdfb6fc1281a902aa200b817434558ee30cddb24a7fa4c915ec35ca72
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to direct users to harmful sites. The ML classifier and ClamAV detection further support its malicious nature, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=mariano+rivera+autograph+worth In PDF document text
    • https://zegaxazidunuxe.weebly.com/uploads/1/3/4/7/134746987/karegizif-majureg-zokaluz.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/roruj-fegedevovelere-zexomojikazi-rewubujelem.pdfIn PDF document text
    • https://fineruliji.weebly.com/uploads/1/3/4/3/134313455/meguletaru.pdfIn PDF document text
    • https://bamaxasujobuz.weebly.com/uploads/1/3/4/3/134315865/4790121.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388815/normal_5fcf5c14a4528.pdfIn PDF document text
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/765776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426813/normal_5fa2338874f60.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/zugutixe/cambridge_primary_english_stage_5.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/update_huawei_p10_plus_android_9.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/chopsticks_waltz_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3732f9dd-e80e-47cf-b014-91e5c8f56348/nikon_prostaff_rimfire_ii_bdc_150.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/zowixawe.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/bluestacks_for_macbook_air.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/22919651971.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_off0000dcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 5028 bytes
SHA-256: 1c3d369fc2c49d7ac198cdcf07ec2616f7829abf0e34d31445cb599838774754
font_01_sfnt_off0000ee10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 10632 bytes
SHA-256: 7c9713f048910a980da4147a5581184afd5eb7cac2905913d7f97161afc6c1a5

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