Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bba307296a6a08a…

MALICIOUS

PDF

84.6 KB Created: 2021-03-15 14:30:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 068c8f7c2f951fe83b5f3a0cc8c2bfdc SHA-1: 963e558d06a4d2606d499b72d8a8aaa585d662a5 SHA-256: 8bba307296a6a08a73c06ade0a4bddee0f87af3035007e13ea2793773e26511e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it's part of a link farm designed to distribute malicious content or phish users. The primary malicious URL identified is vilenefex.ru, which is likely used to host or redirect to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://vilenefex.ru/award?keyword=all+fruits+and+vegetables+names+with+pictures+pdf
    • http://rebituzugofebo.22web.org/56553048345.pdf
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/7083618.pdf
    • https://cdn.sqhk.co/xorilulog/ibzgHgf/funny_sms_tone_2020.pdf
    • https://cdn.sqhk.co/duwefetufe/ngc3hge/cup_stacking_song_lyrics.pdf
    • https://cdn.sqhk.co/nulupitet/nBifih8/84546431973.pdf
    • https://cdn.sqhk.co/fiduzosi/mZ4YijU/christmas_game_bubble_shooter_2020.pdf
    • https://mirebaxowani.weebly.com/uploads/1/3/4/0/134017623/wirelud_wuviwuliji.pdf
    • https://cdn.sqhk.co/juxezijafoz/sdiadF4/62250364804.pdf
    • https://cdn.sqhk.co/taduzotul/jfhaGic/51917320262.pdf
    • https://cdn.sqhk.co/widafopaj/gdVgchg/hotstepper_remix_2019.pdf
    • https://cdn.sqhk.co/zidexamuwela/aiegfkX/snake_vs_block_hack_apk_download.pdf
    • https://cdn.sqhk.co/zoribakim/bZNhjm7/kpop_usa_online_shipping.pdf
    • https://cdn.sqhk.co/jeforije/ygjig7h/sosijoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_2779f02c56ad4dcc84badd4eaf4107bc.pdf?index=true
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_0b487c8ebcce456b82fcd2fe91db510b.pdf?index=true
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_b2eae60299854de4aa6aad9a71589a89.pdf?index=true
    • http://xezigogologivam.rf.gd/50880103152.pdf
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_61685e1c00b04efdaef3fbb0c861a4bb.pdf?index=true
    • http://kipinoda.rf.gd/15623470719.pdf
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_8f95c1a9cb7d474985a15014487bdace.pdf?index=true
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_67d57a4ed50048aca1053670a6d5cc17.pdf?index=true
    • http://kinowazekuponaw.rf.gd/46765857008.pdf
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_866ae1388eb34d7589d8e35174cd3c6c.pdf?index=true
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_8e7cb3bdf4984ed19409e87a4405377d.pdf?index=true
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ca.bin
2b8bfa67c0f87fd3fd4a8a23f31bf53c4432fb992ee714d2336a3e880f35c03f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 5624 bytes
font_01_sfnt_off000104bb.bin
c157cae5f8101a6e64bcd99ea2d23f580ec015632e984fb761751a1b38ca5e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 10392 bytes
font_02_sfnt_off0001286b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1286B 4324 bytes
font_03_sfnt_off0001366c.bin
670b3d3aac0a8ad0b752d385c15d5e11e81f81758e328345c8e47bce4fe4722d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1366C 3372 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.