Malicious PDF — malware analysis report

Static analysis result for SHA-256 56fc381ab7d5c9ff…

MALICIOUS

PDF

78.2 KB Created: 2021-03-14 15:37:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 778e733af2c85981bf17764051a71921 SHA-1: ded8643747ca0cbc2443ea0f82de646b6bd7cc18 SHA-256: 56fc381ab7d5c9ffa5c1deddf9a0e2dbee8eaa8e7b85cd9725aff6f5cc09e03a
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=wniosek+ceidg+w+pdf PDF link annotation
    • http://rewita.fun/bose_quietcomfort_15_user_manualsltpw.pdfIn PDF document text
    • http://prizinsta365.website/sample_ballot_philippines_2019gl3zz.pdfIn PDF document text
    • http://gifinibufenatar.medianewsonline.com/what_are_visual_examples.pdfIn PDF document text
    • http://shimano-stradic.ru/4606040128346r3u.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/lanuzuzoxiriwegikovowu.pdfIn PDF document text
    • http://nakrutkavk.site/tibazej5gct.pdfIn PDF document text
    • http://linefofaxugedu.mywebcommunity.org/principles_of_business_management_download.pdfIn PDF document text
    • http://sexogovo.iblogger.org/architecture_plan_software_free.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/51085898704.pdfIn PDF document text
    • http://megahit.space/arches_national_park_guide29656.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujexig.epizy.com/new_movies_2018_tamil_free_tamilrockers.pdfIn PDF document text
    • http://norezodo.rf.gd/adolescence_education.pdfIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_cc868a58d8434f0a905587ee140626a3.pdf?index=trueIn PDF document text
    • http://xedoruvuseju.rf.gd/morning_pages_journal_template.pdfIn PDF document text
    • http://wilixafex.epizy.com/aararum_kaanathe_allu_ramendran_song.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_440fbd2473854756ae2e87f53e30ea41.pdf?index=trueIn PDF document text
    • http://vafowoloxesimam.rf.gd/finance_interview_questions_and_answers_download.pdfIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_25672289ea7d46b7b50d48aedda7c810.pdf?index=trueIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/fighter_5e_fighting_style.pdfIn PDF document text
    • http://kepipejesa.epizy.com/75162072785.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_off0000f241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF241 5156 bytes
SHA-256: 0b3248e3557200e32bf7960be2738872f5c97b28951b2a0ee7633ccfaef97a93
font_01_sfnt_off0001040c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 11976 bytes
SHA-256: 97a8f462b7596a63e4d18177b25deb4114465e4a9305bdcd7b27ff1c99ec1576

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