Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b56945e0f56668…

MALICIOUS

PDF

83.2 KB Created: 2021-03-15 05:20:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 97a3cc6afb9d097a95f4a84bec5bf973 SHA-1: 31bf3e2eb5229be3c39a1f46adaa0c082e04fc77 SHA-256: f8b56945e0f56668661cf3ca391c1bc3f7bede0e04cab62e6f73fbfb577db40b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier flagging indicate malicious intent, likely to redirect users to phishing or malware sites. The embedded URLs and the document's structure strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8633

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/award?keyword=lala+ramswaroop+calendar+2020+pdf+file+free+download PDF link annotation
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/7339329.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/QhctZ26/castaway_cay_disney_5k.pdfIn PDF document text
    • http://jazeforip.22web.org/2676561927.pdfIn PDF document text
    • http://xowozumevabig.66ghz.com/hallelujah_song_lyrics.pdfIn PDF document text
    • https://wikagigodoxuf.weebly.com/uploads/1/3/2/8/132814929/famodimik.pdfIn PDF document text
    • https://cdn.sqhk.co/juvokapo/HRnhioi/rebel_inc_apk_premium_1._4._7.pdfIn PDF document text
    • https://devojakosumu.weebly.com/uploads/1/3/5/3/135314674/rerenaburox-fametawedofum-rebofonatani.pdfIn PDF document text
    • https://cdn.sqhk.co/junikesiza/UdUgiEA/vidika.pdfIn PDF document text
    • https://zawibovime.weebly.com/uploads/1/3/2/6/132681883/gevujerokibo_bixesof_saxizusubosason_jifowure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pejulok.epizy.com/mnps_pay_calendar_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec386c5-75eb-447a-a3b2-5a01db566dcf/jireleru.pdfIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_20839972398f4a2b8a60ee84c2e42462.pdf?index=trueIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_c2f592f69912423f9322e726ed5423f4.pdf?index=trueIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_5046ce422b7f44e193df5ca1b259a90a.pdf?index=trueIn PDF document text
    • http://dagubafevipiken.epizy.com/baghban_title_songs_320kbps.pdfIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_5deae3bf290e4b9b93ff104d5161df31.pdf?index=trueIn PDF document text
    • http://sobakijej.rf.gd/1477949522.pdfIn PDF document text
    • http://kemaduxisi.epizy.com/how_to_prepare_for_security_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc115eff-63fe-43f4-bfb9-73dbd37246e7/53349113869.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_99429d51ff7a4a0da906f4342241b69c.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA62 5316 bytes
SHA-256: ae7aa24bd397f3ccc02553921a6d641cc243bd70e63755436d8753a5fec83daf
font_01_sfnt_off00010c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5D 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off000117c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C0 10584 bytes
SHA-256: e04dab9cecbbb6a47ee2ec6325580c7bb203b7a88de81f707a0896ac2d9cd8c6
font_03_sfnt_off00013bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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