Malicious PDF — malware analysis report

Static analysis result for SHA-256 314200d2d0a97bc8…

MALICIOUS

PDF

84.7 KB Created: 2021-03-23 13:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 54e48b11c98a7d1ba12b798fb1779612 SHA-1: fdc680d2ed837399ebc4dab2c6bebf4f2c498c9b SHA-256: 314200d2d0a97bc807b2fe89905781abbaf05caf5d1f8144688e989c618dfd4b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, suggests an attempt to execute malicious code or further facilitate the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=missed+calls+when+phone+is+off+iphone PDF link annotation
    • http://midikakuvekume.mywebcommunity.org/93530459440.pdfIn PDF document text
    • http://opendouche.xyz/jukitezapob7vpk.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/algorithms_sanjoy_dasgupta_solutions_manual.pdfIn PDF document text
    • http://4escam-bot.online/zakupepuluxikebakuxiginm4ff6.pdfIn PDF document text
    • http://republvinb.fun/45207275696uw2zx.pdfIn PDF document text
    • http://dressnbuy.com/guxupqtred.pdfIn PDF document text
    • http://glasshookahcatering.com/fractions_on_a_number_line_worksheet_grade_3qev3r.pdfIn PDF document text
    • http://tabikola.online/shimano_ultegra_r8070_di2_disc_groupset_weight8sggs.pdfIn PDF document text
    • http://zitokujamu.mypressonline.com/64276575457.pdfIn PDF document text
    • http://rudovatimokasum.medianewsonline.com/61829987947.pdfIn PDF document text
    • http://damvglaz6.xyz/ben_10_up_to_speed_mod_apk_2020run2h.pdfIn PDF document text
    • http://topuniversityru.fun/my_boy_gba_emulator_paid_apkc3w81.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/rolefosiju/zebubunutokigi.pdfIn PDF document text
    • http://bidejepeko.onlinewebshop.net/apa_itu_kindle_paperwhite.pdfIn PDF document text
    • http://jidoreno.epizy.com/nidemosolibevanatanezelos.pdfIn PDF document text
    • http://javagumi.rf.gd/lixozekesiviwowalomu.pdfIn PDF document text
    • http://zemagarekerak.epizy.com/one_less_bell_to_answer_glee_karaoke.pdfIn PDF document text
    • http://mitazitovir.epizy.com/46497320636.pdfIn PDF document text
    • http://nekelaxowe.atwebpages.com/79480797781.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/josogopakenoxidubewa.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_off00010c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C85 5244 bytes
SHA-256: e44d3115d2918bb5f9c576e5a0814dcde0d7ddcec811296c80a100e7d990d54b
font_01_sfnt_off00011e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7C 11304 bytes
SHA-256: 440117e0f255640123b3acc06225476a386984cb910616685d5831bb3f6b3fa8

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