Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae06c91b6871ac4b…

MALICIOUS

PDF

79.1 KB Created: 2021-02-17 21:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2a420a1a0eed44bee362f72a8ad352ea SHA-1: 768558eab2e6e2cc5cd581af794c40e3eca8a0bc SHA-256: ae06c91b6871ac4b213ded430327d386f9b99cf519d762f9fc35397e989a5b92
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and link farm attack. It contains numerous external links, including one pointing to a PDF file on social-whisper.ru, suggesting an attempt to redirect users to malicious content. The document body's deceptive text about free courses serves as a lure to encourage interaction with these links.

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
  • 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://bologen.ru/strik?utm_term=free+online+project+management+courses+with+printable+certificates PDF link annotation
    • http://social-whisper.ru/ginamabanav354xr.pdfIn PDF document text
    • http://com-signto2.xyz/concours_castor_informatique_2018_mathmatiquesyoqhd.pdfIn PDF document text
    • http://bullbananavannaone.xyz/tevatedofoxefagajafiraken3dv3.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/lazakuko_kumizetafi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_60145c6397087.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/1795323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_600ffb6fa9e5f.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/Pl4xigs/welasunalasadoripavos.pdfIn PDF document text
    • https://mogufujekomepit.weebly.com/uploads/1/3/1/6/131607600/zejajojibet-wemubazimokesez-linoxorunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_601b631290d50.pdfIn PDF document text
    • https://funefazadoma.weebly.com/uploads/1/3/4/6/134648765/b018dd06624.pdfIn PDF document text
    • https://titoboxe.weebly.com/uploads/1/3/0/8/130874676/249a12df77.pdfIn PDF document text
    • https://mavulirapiba.weebly.com/uploads/1/3/4/7/134741644/lidisotete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403127/normal_60240f3a82093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gomaxod/bagpipe_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/7282956016.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/what_you_ve_been_up_to_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/tefitanevanaxit.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/barlow_font_free.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_off0000e9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B9 5576 bytes
SHA-256: df9fd959baa63954b6a6d3937bbdcf860368f80b17d32d2472f72b7ebe76ffd5
font_01_sfnt_off0000fc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8E 10664 bytes
SHA-256: 1590148ec840219481b5b1c041dc7aead80acf676716aaac1ffd21c01f1be4d2
font_02_sfnt_off00012039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12039 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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