Malicious PDF — malware analysis report

Static analysis result for SHA-256 153b9cb67f7d4049…

MALICIOUS

PDF

82.1 KB Created: 2021-03-10 07:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cb7c6f4ed4d74c5040e741a9d289b810 SHA-1: a3c505ec985f3125f5eadd8fab360f01499afd89 SHA-256: 153b9cb67f7d404959d91595fedd0997d92ac6611a750d84c35492fc4ab2dd51
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs, 'https://ponafet.ru/strik?utm_term=what+is+the+sound+of+raindrops+called', appears to be a redirector. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, potentially leading to further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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
  • 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://ponafet.ru/strik?utm_term=what+is+the+sound+of+raindrops+called PDF link annotation
    • https://cdn.sqhk.co/radojiga/LJWgd0c/introduction_to_business_grade_10_textbook.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/ikZeaji/pavunazeme.pdfIn PDF document text
    • https://tadarumoroje.weebly.com/uploads/1/3/4/7/134724086/nenak.pdfIn PDF document text
    • https://timemojorejo.weebly.com/uploads/1/3/1/4/131437846/bbd88107f7ced3.pdfIn PDF document text
    • http://power-guard.shop/dental_assistant_school_logan_utahut8by.pdfIn PDF document text
    • http://lenijer.22web.org/the_pocket_universal_methods_of_design.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/gjaYygi/mewatimobifasigil.pdfIn PDF document text
    • https://cdn.sqhk.co/wavoperusina/LRP7Dgh/madikoporisus.pdfIn PDF document text
    • https://zeduwekikozive.weebly.com/uploads/1/3/6/0/136050246/88b9b58ed22aafc.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/d7hhJeK/22550791421.pdfIn PDF document text
    • https://cdn.sqhk.co/nibijegun/fThbRG5/best_panic_button_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/hgidgjp/pop_shooter_blast_game.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/b68bc73.pdfIn PDF document text
    • http://it50disconto.info/wimajefewowinuvuzu6a84u.pdfIn PDF document text
    • https://ragurukenawuxif.weebly.com/uploads/1/3/4/6/134667210/181d6b529f05d.pdfIn PDF document text
    • http://simcars.ru/a_dolls_house_text_typehi7b5.pdfIn PDF document text
    • http://bifitiguz.iblogger.org/bluestack_3_64_bit.pdfIn PDF document text
    • http://itawegan.space/514620664730zy8v.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/jdIiegB/monster_craft_2_android_gameplay.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://mapixuxiloko.epizy.com/kumbalangi_nights_meme_template.pdfIn PDF document text
    • http://voronuxo.epizy.com/78992223118.pdfIn PDF document text
    • http://rojolegov.epizy.com/95659554909.pdfIn PDF document text
    • http://nalotewo.epizy.com/70877729044.pdfIn PDF document text
    • http://fagejezuk.epizy.com/estructura_linguistica_del_texto_descriptivo.pdfIn PDF document text
    • http://serivisaruwe.epizy.com/taman_nasional_alas_purwo.pdfIn PDF document text
    • http://sozijajetazojuk.epizy.com/besoins_fondamentaux_maslow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 5140 bytes
SHA-256: 29825e5da2a7e6b03d74281642ec33eb3070b2cc52ac6741988524150b3fded7
font_01_sfnt_off000108c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C0 10488 bytes
SHA-256: ad86da6beac23ce9fe19b85d81e315971290701b2dc336b2dac1c0ffc60e4b66
font_02_sfnt_off00012c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C95 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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