Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93b9de45b21c94f…

MALICIOUS

PDF

76.3 KB Created: 2021-03-31 03:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2254a0ba61ecb108991ef37060caad38 SHA-1: d29b3abc1048806cf404fe757b4bbc823a339afc SHA-256: e93b9de45b21c94f6077185f14c1bfb17681890413904e6a33778a7f8634121b
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO farms or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'CLAMAV_DETECTION' confirms it is recognized as malicious. The document body, though heavily obfuscated, contains text related to PDF downloads, suggesting a lure to disguise the malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6994

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xajibur.ru/award?keyword=sahih+bukhari+bangla+pdf+download
    • https://fejiwapofiji.weebly.com/uploads/1/3/4/6/134699364/4135807.pdf
    • https://wapilumavazari.weebly.com/uploads/1/3/4/4/134446451/c87b3f.pdf
    • https://static.s123-cdn-static.com/uploads/4385214/normal_5ff0e2be50929.pdf
    • https://fumaletaseker.weebly.com/uploads/1/3/1/3/131381433/c1d4926404292f.pdf
    • https://cdn.sqhk.co/girewobo/ZjfiZhf/vevut.pdf
    • https://cdn.sqhk.co/moserusoba/figgdgf/sell_kohl_s_gift_card_for_bitcoin.pdf
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/45b17f724c.pdf
    • https://nokatumevizo.weebly.com/uploads/1/3/2/7/132740479/nodikunoguzibowat.pdf
    • https://static.s123-cdn-static.com/uploads/4418362/normal_5ff02c1d1283f.pdf
    • https://cdn-cms.f-static.net/uploads/4446398/normal_5fd76b5338233.pdf
    • https://cdn.sqhk.co/gepumenujeme/jhjh1Nf/777_casino_ave_thackerville_ok_73459_usa.pdf
    • https://cdn.sqhk.co/vedanoderifu/3XHibif/rexalufafoxikig.pdf
    • https://cdn.sqhk.co/wodelaganav/jegjxCY/arbetsgivare_utan_fast_driftstalle_i_sverige.pdf
    • https://cdn.sqhk.co/mujowofapubi/aicBhIp/subway_santa_runner_2020_advanced_edition_vs_standard.pdf
    • https://cdn.sqhk.co/kizofapekeku/VxXE7wS/subway_runner_fallout_4.pdf
    • https://cdn.sqhk.co/mogizufofuj/iiZgd2t/vinujanufasafidi.pdf
    • https://cdn.sqhk.co/xakurusuk/OIKgcjg/world_chef_game_how_to_build_walls.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bulikowexunepov/why_will_my_washer_not_fill_up_with_water.pdf
    • https://s3.amazonaws.com/davubewu/the_crystal_healing_guide.pdf
    • http://viganoxoloni.rf.gd/89602741115.pdf
    • https://s3.amazonaws.com/nefomojuwet/dopenojizowekevato.pdf
    • https://s3.amazonaws.com/xarojapi/22853369181.pdf
    • https://s3.amazonaws.com/gumegulaxi/how_to_assemble_a_drop_side_crib.pdf
    • http://lubozogemodusa.epizy.com/15151449786.pdf
    • http://gogositanisewu.rf.gd/77700290667.pdf
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e254.bin
f15bf29b909662c2375a6fd3a26167e499977ec6de9942918eb75ad2b33c5e4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 5524 bytes
font_01_sfnt_off0000f526.bin
d626c880a2f390526e6115585b7b5ff49f0ea177fb553faeb924d1a1bad15c09
pdf-font-stream PDF embedded font (sfnt) at offset 0xF526 17148 bytes