Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15477d26ef95833…

MALICIOUS

PDF

81.8 KB Created: 2021-03-11 19:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0be9f79b394c44c89378cc7e4468e5ba SHA-1: 213dfb8ad2240348cd4cf64633e45691b7592d8d SHA-256: a15477d26ef95833cca2a2f60a5e093fe6cd1f52563b0eb5b722f65f6b581872
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://leonvi.ru/award?keyword=comment+r%25C3%25A9unir+plusieurs+fichiers+pdf+en+un+seul+sur+mac PDF link annotation
    • http://medway24.com/81744032665xkp9h.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/5896301.pdfIn PDF document text
    • http://boputev.66ghz.com/60477095741.pdfIn PDF document text
    • http://geleostone.online/84979564909eu2rk.pdfIn PDF document text
    • http://plsale.pro/9_months_before_october_24_2006aw1sy.pdfIn PDF document text
    • http://viza.expert/steven_universe_ski_adventure_time_crossover_fanfictionnelt4.pdfIn PDF document text
    • http://webmastervlad.ru/fireball_anime_20204ah7j.pdfIn PDF document text
    • http://esplus.pro/20672589765e22aq.pdfIn PDF document text
    • http://weraka.online/interpreting_a_food_web_aurum_science_answersti47o.pdfIn PDF document text
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/tazufotuvum.pdfIn PDF document text
    • http://hookup158.fun/what_is_law_of_intellectual_propertybd7bv.pdfIn PDF document text
    • https://pagilosotutan.weebly.com/uploads/1/3/0/9/130970008/bexabax-xujoledera-woxatisedopod-motarasujim.pdfIn PDF document text
    • http://akmurzina.com/diy_large_3d_printer_plans4heo7.pdfIn PDF document text
    • http://bio-ita.fun/135429670kxsd4.pdfIn PDF document text
    • https://mepodatadun.weebly.com/uploads/1/3/1/4/131452799/1997236.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/39892417205qf7u2.pdfIn PDF document text
    • http://helpcenter.business/592488581677c9sd.pdfIn PDF document text
    • https://kemodiduwe.weebly.com/uploads/1/3/4/2/134235489/4450856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/mathematics_grade_7.pdfIn PDF document text
    • http://ruxurosagogaru.epizy.com/gefuvomiku.pdfIn PDF document text
    • http://mulagokonud.rf.gd/football_clubs_for_9_year_olds_near_me.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/planet_earth_2_jungles_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/ejercicios_aumentativos_y_diminutivos_4_primaria.pdfIn PDF document text
    • http://vexeger.rf.gd/android_go_os_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/bodiboduja.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/56516131592.pdfIn 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_off0000fdcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCD 5444 bytes
SHA-256: 40bbb358cb7be1ef43b6d96a02a88c3eb21605334779067381b03f38226affbc
font_01_sfnt_off00010fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD9 12304 bytes
SHA-256: 62548ef43325aa3869a627dfa9b04b00448212dbadd2f40b53a3aefb56012c5c

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