Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47e9eabc750624e…

MALICIOUS

PDF

86.0 KB Created: 2021-05-08 08:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc37df620cd472cca346321da638b76e SHA-1: d5d8447ed13a166ce2c2af24a588bfb27ac2ed0e SHA-256: e47e9eabc750624ecd5269f8c6d00d969f8863348a19213aeb5657e060411c15
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a phishing site or download further malware. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=hp+elitedesk+800+g1+twr+ram+specs
    • https://kobirozo.weebly.com/uploads/1/3/4/8/134846370/2987126.pdf
    • https://wutarodopa.weebly.com/uploads/1/3/4/2/134266687/pazimit_nokuwe.pdf
    • https://taburexil.weebly.com/uploads/1/3/4/3/134374137/8e1fad.pdf
    • https://vesalitekaso.weebly.com/uploads/1/3/4/3/134314643/805216.pdf
    • https://cdn.sqhk.co/kopilixa/cPhaKdv/ares_virus_game_guardian.pdf
    • http://torixobo.mypressonline.com/domevizurogunotarabivojum.pdf
    • https://cdn.sqhk.co/xagaxubibiz/a5idgda/52114739981.pdf
    • http://tumuduwaju.mypressonline.com/kibumedemutom.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_a2d07d33dd4f42128dff32416dba0269.pdf?index=true
    • https://a49ec80b-b4e3-4dac-84ed-d687b6aff6a5.filesusr.com/ugd/46d696_9cdac886b6c949ab981716e77cee6599.pdf?index=true
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_176dcb1ea70e41a5ad9908519ac7ca37.pdf?index=true
    • https://b4e79a3f-0083-4b26-8056-4fe87fb46dfd.filesusr.com/ugd/332c1b_89105c50154045b6a8e83b1ba4a47bb5.pdf?index=true
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_28207cca2824456aa899dc0fa9b384d9.pdf?index=true
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_e1f50f86e0ed47a490eae5026fa6f463.pdf?index=true
    • http://bilisedutave.myartsonline.com/keeping_up_with_the_quants_your_guide_to_understanding_and_using_analytics_free.pdf
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_3ec020a505a245eda84d1c1d8660bec0.pdf?index=true
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_f32ce1b140a24dbcbbe522721ba23ce9.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000fdec.bin
b283dba80d80d6eac4b9fb82a997b580089edb13fdd5bebe71e8afab3496c712		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFDEC 13496 bytes
font_00_sfnt_off0000e9e0.bin
880b405c7e9e39ceda839b31bed67798dde09d8c56e35f5f85e1c4f38e80fab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 5900 bytes
font_02_sfnt_off000123b7.bin
1a25b54e32ec29100641dc809dcf735f4e3c6e2aa6a5a967d3595843d15fd76e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123B7 10764 bytes

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