Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb60a781f2fc2657…

MALICIOUS

PDF

81.7 KB Created: 2021-03-29 12:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbbe67e9ff41e66246fc8210b9554c1f SHA-1: 99b1f5e34e62fee2ee7f0ecfa3096d03cacc9b10 SHA-256: bb60a781f2fc2657f69faa2c5fd91ac60484b8132a85ee0a570d367dd54016c1
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including a link farm, suggests an attempt to manipulate search engine results or redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to PDF generation and potentially deceptive content, further supporting a phishing or malicious download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/award?keyword=data+science+do+zero+joel+grus+pdf+download
    • https://bazopozetera.weebly.com/uploads/1/3/1/6/131637116/semogovidotuw_bapegafu.pdf
    • http://govnososal.xyz/whatever_happened_to_michael_from_the_blind_sidey6faz.pdf
    • https://rakumimow.weebly.com/uploads/1/3/5/9/135957304/xixesapow_rogakolaluzidap_witode.pdf
    • http://powerhdniy.space/ezel_aya_indir3pzhz.pdf
    • https://jugotogosef.weebly.com/uploads/1/3/0/8/130814460/4046753.pdf
    • http://mazers.fun/what_are_the_composers_main_problems_in_writing_music_for_filmssfkbo.pdf
    • http://cancandance.org/the_ultimate_measure_of_a_man_full_speechn4doa.pdf
    • http://dazazalemofofu.iblogger.org/catalogo_avon_17.pdf
    • https://ribiridoxa.weebly.com/uploads/1/3/0/8/130874248/6096451.pdf
    • http://detonic-deutschland.website/825968554733nghf.pdf
    • https://givolejemaxo.weebly.com/uploads/1/3/5/3/135345859/dofezofixuneke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_ae29f82bb813429186b5c47452ead81a.pdf?index=true
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_733c4f2cec1f4d2491d08d503835f17b.pdf?index=true
    • https://s3.amazonaws.com/tometubufimopim/rafexupezakumupawug.pdf
    • https://uploads.strikinglycdn.com/files/e3dd757f-0be5-45d5-978d-93f4dd766fce/janarupewulaxatuwuwagas.pdf
    • https://206c1dc7-391c-4b20-ac64-b63c97020fd4.filesusr.com/ugd/87773f_708d1f3855114bd9b39f08a545e0aa51.pdf?index=true
    • https://s3.amazonaws.com/libowebujakux/86101279173.pdf
    • https://uploads.strikinglycdn.com/files/4bae23b3-3045-42a1-96c1-f206ca1c965d/30261815147.pdf
    • http://vemirukediwugo.rf.gd/how_to_clear_voicemail_on_verizon_lg_flip_phone.pdf
    • http://xegefonupekowa.epizy.com/45935654740.pdf
    • https://uploads.strikinglycdn.com/files/4eaaf8c3-5013-4072-b139-118b4e57f78b/95192770685.pdf
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_6d0b785020034ced8ec89bd42e8258c8.pdf?index=true
    • http://potubavaziripek.epizy.com/bagnold_sun_compass.pdf
    • https://s3.amazonaws.com/tinezedu/jawukaminadawusafusosad.pdf
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_586cd09db6544379aef625d3d4214bdc.pdf?index=true
    • https://s3.amazonaws.com/mixanaz/words_that_start_with_nomin.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffeb.bin
9983519d23bc8ac103501eeb6d87ccef0a0bbea169daa1ff7f3aab67312cde52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEB 5540 bytes
font_01_sfnt_off000112fd.bin
aa8f44befc2522be7409e621573fe9eef9c76d6e9d219f9c82360ebeb9270def		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112FD 11820 bytes

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