Malicious PDF — malware analysis report

Static analysis result for SHA-256 f88cb35a50aa2689…

MALICIOUS

PDF

81.5 KB Created: 2021-03-14 10:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 178e8da2b8ead2041fecbbdabfef09cf SHA-1: aece80a646465abb1e977120cb0c90b60b3b1f1a SHA-256: f88cb35a50aa2689fb812be30522b25c0b8d97655c22aaffb48b5123393f7e01
96 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to potentially malicious content, masquerading as legitimate documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains keywords that align with the lure URLs, suggesting a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=nursing+bed+making+pdf
    • http://fanuvazav.scienceontheweb.net/guide_to_plant_pathogenic_bacteria.pdf
    • https://cdn.sqhk.co/wiluxuko/LFibTfn/carson_wentz_college_degree.pdf
    • http://laluwaraselolar.mywebcommunity.org/nedarimowawobag.pdf
    • http://bamirajewenexo.medianewsonline.com/56409092535.pdf
    • http://anarchymedya.com/o_exorcismo_de_anneliese_michel_livrizmy3.pdf
    • https://cdn.sqhk.co/fakujodi/HzjiflP/partnership_agreement_south_africa_free.pdf
    • http://naliputa.mywebcommunity.org/why_is_arbonne_not_a_pyramid_scheme.pdf
    • https://cdn.sqhk.co/linidivez/btTUoib/14670650985.pdf
    • https://verevivomilob.weebly.com/uploads/1/3/0/7/130738769/c81ac98ab0.pdf
    • http://kikababono.mywebcommunity.org/dixife.pdf
    • http://italywow.space/start_your_own_podcast55i7u.pdf
    • https://dolilugufup.weebly.com/uploads/1/3/0/7/130776220/3ddd7362e25.pdf
    • http://parkingtest.xyz/completing_the_square_when_a_is_not_1_gcseaptpj.pdf
    • http://piwulag.sportsontheweb.net/bpsc_question_papers.pdf
    • https://cdn.sqhk.co/ruwopazeg/eHhfXL4/catalytic_reforming_in_petroleum_refining.pdf
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/roselofuna.pdf
    • http://tevutubiwij.getenjoyment.net/what_is_the_theme_of_the_pit_and_pendulum.pdf
    • http://zekojotewakugag.mypressonline.com/delonghi_pinguino_pac_an285gn_bk_700_sq_ft_portable_air_conditioner.pdf
    • https://favaruzikab.weebly.com/uploads/1/3/4/8/134871436/806c75.pdf
    • http://edaruzal.xyz/rifawegodubovudixogegayi8cn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wejajesenopezoj.onlinewebshop.net/simplifying_trigonometric_expressions_worksheet_with_answers.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_off000100af.bin
79c6fff3a55212fb4adef8e99f89c15c5ec6c41835de29ba36d5e0c16e03685e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 5504 bytes
font_01_sfnt_off00011354.bin
275d296aaa7764baf0dad1a7827749d704d4430ea1e0a7709af476eb6799eb54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11354 11036 bytes

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