Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea7b53a4445ebe4…

MALICIOUS

PDF

81.8 KB Created: 2021-03-22 05:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bce5f811e61384d3875948dd9300520f SHA-1: 7e754f8e9274f6453c8168e28ca92117b3cd9994 SHA-256: 7ea7b53a4445ebe4b894e984aec382280c218838e32c4e3b3ca0c4a7cb11586c
164 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 in SEO link farms to disguise malicious activity. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/award?keyword=spelling+bee+word+list+2020+pdf
    • http://lebedugipul.mywebcommunity.org/textaufgaben_bruchrechnung_mit_lsungen.pdf
    • https://cdn.sqhk.co/vafegijateno/h0hbCid/dukibopupeb.pdf
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/38fddfe9.pdf
    • https://cdn.sqhk.co/kurinunuwor/ehaY9jc/ski_jacket_womens_sports_direct.pdf
    • http://digodagexokofi.22web.org/how_much_rice_per_acre_in_india.pdf
    • https://cdn.sqhk.co/tetolonul/eFLiWRf/53710535690.pdf
    • https://liletizotefos.weebly.com/uploads/1/3/4/2/134234842/9702736.pdf
    • http://fovikoxesaweziz.medianewsonline.com/tugasotudad.pdf
    • https://cdn.sqhk.co/kowalaxu/fPU7Vhj/ice_prince_kpop.pdf
    • http://komozazene.getenjoyment.net/62482379781.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_68e415c7c6d74bb5b3a6b89547da2f57.pdf?index=true
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_34f39f79c9044738a1b08a054c78200d.pdf?index=true
    • http://varupijijajeb.rf.gd/hoover_carpet_cleaning_solution_pets.pdf
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_595ae1d36a344d4189ad75a0af2468a1.pdf?index=true
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_fe9efb8cdfdb4d229115a953a390a3a8.pdf?index=true
    • http://tizexazebubo.atwebpages.com/80311697743.pdf
    • http://nozozuwovore.atwebpages.com/can_you_still_use_rabbit_ears_to_watch_tv.pdf
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_c73700b2240745799493bccfa83b615b.pdf?index=true
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_ef5fec402b8e4c15aa7fd760709b7b7d.pdf?index=true
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_9c0be045a1cd43448203aecdd2c8c4f7.pdf?index=true
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_7c2a455f1ee24841a2791dd4e4c1c98f.pdf?index=true
    • http://segivatoku.epizy.com/how_to_open_a_trampoline_park.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_off0001013e.bin
40821f79421857295e2a71035ed070464fc2c045feb5b82059c4e7f93440877f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 5608 bytes
font_01_sfnt_off0001147b.bin
4697fbca7b1d21559149090f20f1ed743a66680ad9ad65bffc6d29b31de4cb29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1147B 10596 bytes

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