Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd910091132e9b0…

MALICIOUS

PDF

82.3 KB Created: 2021-03-27 18:55:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0509c214ca630ef58a5045c68868acae SHA-1: a0e48ab23a35aadc7a37e2068c1ec81defadd0a8 SHA-256: dfd910091132e9b0ec437d0d794b82ed7595d0d014c5bf0b7242d737d9fafc75
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to software downloads, further supporting a phishing or malware distribution attack pattern.

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://druttle.ru/wix?keyword=sms+backup+and+restore+apk+mirror PDF link annotation
    • http://homebig.space/natotazaturadidefunixizfb63.pdfIn PDF document text
    • https://gulipuzajetag.weebly.com/uploads/1/3/5/3/135397689/4d947f48d1e.pdfIn PDF document text
    • https://nukogakulezov.weebly.com/uploads/1/3/1/3/131378840/599beb.pdfIn PDF document text
    • http://amsidgi.xyz/zaziribaxeravt7yq.pdfIn PDF document text
    • https://zejinimab.weebly.com/uploads/1/3/1/8/131856072/nolutixaxufafuwij.pdfIn PDF document text
    • https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/rutovududufab.pdfIn PDF document text
    • http://c-advance.space/why_is_my_champion_generator_surgingue5l1.pdfIn PDF document text
    • http://podeves.xyz/23304398815hq5h7.pdfIn PDF document text
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/xizogemara_bevabola_ganuradugolej_gumepelo.pdfIn PDF document text
    • http://fujubipe.22web.org/vesisaxolejikiresawi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://moliposapivar.epizy.com/antropologia_aplicada.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/why_do_some_songs_bring_back_memories.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_fd0b186bb5a2411c8ddc9b443cb022de.pdf?index=trueIn PDF document text
    • http://zilaxeputeso.epizy.com/christian_songs_tamil_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/43435273481.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/rodapusekowo.pdfIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_9b10ef0775794affa14758cdd7e1fa45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bajuse/blend_s_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/ching_chong_100_template.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/transformer_un_garage_en_appartement.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 3780 bytes
SHA-256: 58820c7f278c4d01b839e1dce30982b9db6bcae8cd995479c69f3838d2bd670b
font_01_sfnt_off0000ec48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC48 5492 bytes
SHA-256: 22b925b9b6b72a3a1cb4757b52918d7f7b76388e1fd67486e4c8cc42a3124882
font_02_sfnt_off0000fedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDC 12176 bytes
SHA-256: 2142526690a1f764e9f1e6a77a74b330ccc06ee07cc122188348d1678cff831e
font_03_sfnt_off00012666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12666 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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