Malicious PDF — malware analysis report

Static analysis result for SHA-256 714f1f1826d4cb2f…

MALICIOUS

PDF

79.8 KB Created: 2021-03-29 11:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4da078c06a833ea0ecced4b91e54b8bd SHA-1: 5137cd535d37e21b5dc668f7dc3c978db6c7464b SHA-256: 714f1f1826d4cb2f4d086e98d71fbf6c0a59d7241bdef4f44310ab37a17f54c5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The embedded URL and document body content explicitly advertise a "hack apk" for "Hungry Shark Evolution", indicating a lure for users seeking cheats or exploits. The presence of numerous external URIs, many on disposable hosting, further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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
  • 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://fokemale.ru/123?utm_term=hungry+shark+evolution+hack+apk PDF link annotation
    • http://dehydratedoriginalgoodness.com/xazesenewodemivivoxiseghc5fk.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/hcZLAha/wintergatan_marble_machine_piano.pdfIn PDF document text
    • http://fitotim.iblogger.org/lala_ramswaroop_ramnarayan_panchang_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/bgihxje/fishing_clash_cheat_codes_june_2020.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/13044279278.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/dejadabadetu.pdfIn PDF document text
    • https://cdn.sqhk.co/fifibaje/dZhjggw/68605619745.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8dea6f00-b35b-4e5f-9f5e-01d9eb130a9a.filesusr.com/ugd/6a8da5_bf5ae894f5a34efa8349904eab6d2761.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/cinderella_2_movie_in_tamil.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_c49ebf75e3db46258e68b224634dde00.pdf?index=trueIn PDF document text
    • http://xojozefobulujox.epizy.com/85692114421.pdfIn PDF document text
    • http://gifilipajodibax.rf.gd/isometric_and_orthographic_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/31741168127.pdfIn PDF document text
    • http://jegojukoge.rf.gd/40816761728.pdfIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_ce710f788c594d6d976d33fa416bde34.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/67922110649.pdfIn PDF document text
    • http://muzulozak.atwebpages.com/90710871638.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/96979081971.pdfIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_fba088e420444538a6ab7d4f88814c9d.pdf?index=trueIn PDF document text
    • http://fikirifulok.epizy.com/taret.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/nejisazizifosodotepufunit.pdfIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_9e7570376d9a493ca5c49b2ad628ade3.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 5380 bytes
SHA-256: 5ef420c6d30d94eebe44ad3a7378854f420f59bec87e96076f480031571f4fff
font_01_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 22568 bytes
SHA-256: 8ec80d930d2b77a0dead0a9538ff4c7ab67163f41b2df9ab445ff8fe3dcb4a08

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