Malicious PDF — malware analysis report

Static analysis result for SHA-256 279e2ae47670e43f…

MALICIOUS

PDF

82.0 KB Created: 2021-03-12 03:31:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 934a79f9932742f23b911772b4100647 SHA-1: e93993479673b8e58973796c9a3f85097878e4c8 SHA-256: 279e2ae47670e43f1e8d970860cb7d0d97ad4cfba125556bbb7b66f1164467a9
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, forming a link farm, and redirects to a malicious URL. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external PDF links, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://zajinet.ru/award?keyword=hanuman+chalisa+aarti+pdf
    • https://xemiwiwoxotewa.weebly.com/uploads/1/3/5/3/135325065/letokonejo.pdf
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/bezopumovo_wuwiw_duzor_lobuwa.pdf
    • https://fukorolavo.weebly.com/uploads/1/3/4/6/134639224/391289.pdf
    • http://tesugujinarijag.mywebcommunity.org/how_to_create_awareness_of_human_trafficking.pdf
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/vutojavidegeg.pdf
    • https://static.s123-cdn-static.com/uploads/4420037/normal_5ff03ea54f88d.pdf
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/mopokedawowi_gidumedepe_gikabob_mifuv.pdf
    • https://dazuneluxenewag.weebly.com/uploads/1/3/4/3/134316856/vagikis_pujofipe.pdf
    • https://cdn-cms.f-static.net/uploads/4417405/normal_600cb3bbb5473.pdf
    • http://fotubobuwenapu.scienceontheweb.net/binurakipivoxuse.pdf
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5ff260f0ed49d.pdf
    • https://cdn-cms.f-static.net/uploads/4505358/normal_601a07589a2c1.pdf
    • http://supermagazforsale1.xyz/edge_animate_cc_free23287.pdf
    • https://cdn-cms.f-static.net/uploads/4418587/normal_603d421894701.pdf
    • http://tumbaa.space/tuvuzobexadefokepejadols8ep.pdf
    • http://zelopaqq.xyz/nihat_hatipolu_sohbet_indirm92ka.pdf
    • http://tezibif.mygamesonline.org/fender_mustang_gtx100_modelling_combo_amp.pdf
    • https://pasojifet.weebly.com/uploads/1/3/0/7/130776368/bubawe_pumajavisezelus_veximiginajiziz.pdf
    • http://axecheat8.xyz/spiritual_weapon_5e_rules00h0n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://vovojoj.atwebpages.com/apgar_2020.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e099.bin
df159e13269b8248553574df8540a5a1c616f6b21cfeb7566f5d91f55996e1ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE099 5356 bytes
font_01_sfnt_off0000f29d.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 3720 bytes
font_02_sfnt_off0000fe00.bin
d0d0782c0cc4ad90fbcc2b12e814add4f2eabd15be167e1ab26eacb039e6f146		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE00 12404 bytes
font_03_sfnt_off00012652.bin
dc1628ec75c0b8638501079257eee6df0cda3ccaa672de338d9e0e57ba578ec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12652 5600 bytes

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