Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd2266c9faf80c0…

MALICIOUS

PDF

73.7 KB Created: 2021-04-08 05:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 45ba438cf19bd593986ac4984524e596 SHA-1: 413c0884fb6b1a50f7fcbc95177c6905c18639df SHA-256: 0fd2266c9faf80c0a5492281c0ae748d5388a8ed803e918ef945f597c9d5ef5e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, 'https://seumenha.ru/strik?utm_term=the+nutcracker+story+book+set+and+advent+calendar', suggests a phishing or malware distribution lure, disguised with a seemingly innocuous theme. The PDF structure and external URI heuristic further support this, pointing towards a malicious document designed to redirect users to a harmful site.

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://seumenha.ru/strik?utm_term=the+nutcracker+story+book+set+and+advent+calendar PDF link annotation
    • http://tapasin.sportsontheweb.net/zigopotamesugavoxiw.pdfIn PDF document text
    • http://riniwovefaraw.22web.org/articles_contractes_exercices.pdfIn PDF document text
    • http://zuluguvo.iblogger.org/breitling_avenger_ii_gmt_user_manual.pdfIn PDF document text
    • http://liwexun.mywebcommunity.org/figenitonugixulo.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/aluminium_mechanical_properties.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_5c7a081b4787481a8ce44d0ca5edfa73.pdf?index=trueIn PDF document text
    • http://xifenarubomes.rf.gd/las_bienaventuranzas_para_nios.pdfIn PDF document text
    • http://bodudenijijeb.onlinewebshop.net/shook_me_all_night_long_guitar.pdfIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_a5312b0e67864763a14d26878c176a7b.pdf?index=trueIn PDF document text
    • http://tixisodid.epizy.com/1_bedroom_apartment_floor_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/dyson_dc39_owners_manual.pdfIn PDF document text
    • http://zejuruk.rf.gd/by_the_time_i_get_to_phoenix_chords.pdfIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_dc53a2b86c8043528a58f4c60e61c1d4.pdf?index=trueIn PDF document text
    • http://radodazemiluk.epizy.com/wixere.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_80f8ac3f91104bbdb091bc423db42ca0.pdf?index=trueIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_6f1e20a1dc4b403bb3287c04123e2cbb.pdf?index=trueIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_03408af9afd14e4bbc7db32b78fd6345.pdf?index=trueIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_195163fc82684bb2ab2f46ad9e055561.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujixus/60162044031.pdfIn PDF document text
    • http://mogopubu.epizy.com/javascript_interview_questions_and_answers_w3schools.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_off0000dd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8D 5340 bytes
SHA-256: 01ab932952fc10c31e44906a81f25c0b417b809dad2c608637a9bddca115fb0b
font_01_sfnt_off0000efb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 11676 bytes
SHA-256: 249517bd290c0f86182be702c6591202525cd0e17aabd8c355e31c035a186ada

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