Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae748d573ecd28f…

MALICIOUS

PDF

66.3 KB Created: 2021-03-21 01:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2897bba77a6b63caa8c803b5df0344a9 SHA-1: 4500e785a3901c1863ba1cb4115f64d52f85d4b0 SHA-256: fae748d573ecd28fc17a7997b2495e3814be79bac3a5dc999124d4cc3a5f2ada
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to drive traffic to malicious sites or distribute further malware. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/wix?keyword=electronics+lab+manual+pdf+free+download PDF link annotation
    • http://slimitalia.space/classroom_rules_flashcards_printable1yuy7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369507/normal_5fe17cd522c2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407102/normal_6003c408604e6.pdfIn PDF document text
    • http://mazafaka69pussy.online/phonics_worksheets_grade_3_freeuvhqm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465702/normal_5ff6313ac79e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_5fe90aff7bcac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447877/normal_5fccef9591b23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410418/normal_5ff9647a4790b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421468/normal_603e8fa18ee4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459788/normal_604d0090a64e5.pdfIn PDF document text
    • http://zevuzigix.iblogger.org/nudatuzumo.pdfIn PDF document text
    • http://pegixudovojap.iblogger.org/zadotovejubukuvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fd085956e9cd.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/jifedefujodu/buxedesolevinonijawatal.pdfIn PDF document text
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_45c18d4de3a04b8abeb2595eb0199d8d.pdf?index=trueIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_21071f2d002d4f85b3bb04364bfb1509.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/summer_waves_pool_filter_type_d_walmart.pdfIn PDF document text
    • http://valogaberel.rf.gd/kisexusujorilika.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/video_instagram_android_apk.pdfIn PDF document text
    • http://bigoxusu.rf.gd/the_river_house_restaurant_palm_beach_gardens_florida.pdfIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_812b776b147a42a49bc51a3574e5f487.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/popuxivufilematisaxikikip.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_off0000c631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC631 5488 bytes
SHA-256: 5bd72dad834cbecde080605d4e339e47a81da77e03bbcfe5eb72ef25f0c94f0a
font_01_sfnt_off0000d8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D4 10232 bytes
SHA-256: ba6d2af118417fcd5534dc7f93e2e2e86547bdfc84d2873be8ce4a90e6b50892

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