Malicious PDF — malware analysis report

Static analysis result for SHA-256 a972410203dd4d49…

MALICIOUS

PDF

103.0 KB Created: 2021-03-05 12:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 1b03230fb630bd69d93e54eb2fb25673 SHA-1: a72864d9aa73aa4711a7c89cb5c6a339a5ee00a3 SHA-256: a972410203dd4d49ab58b63d2d3114d089c6f148e95558114a136b19b9e5c436
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://pelibifir.ru/wix?keyword=clear+blue+digital+pregnancy+test+blank+screen PDF link annotation
    • http://ruwemipuwev.mypressonline.com/79902046964.pdfIn PDF document text
    • https://cdn.sqhk.co/wibezudak/idWL7O1/vuwelesagurufutakaroko.pdfIn PDF document text
    • https://cdn.sqhk.co/xokunafuse/8oji9gc/england_hockey_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/MjieNkV/red_button_up_sweater_cardigan.pdfIn PDF document text
    • http://dunodipike.sportsontheweb.net/xupidovuralababid.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/ie9idzV/robot_unicorn_attack_2_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/hajiyig/jesus_bible_stories_for_toddlers_youtube.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://kilarosine.atwebpages.com/38123022920.pdfIn PDF document text
    • http://gigavolaxo.epizy.com/fe3_is_more_stable_than_fe2_because.pdfIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_254110e495414addaddb433a4c839513.pdf?index=trueIn PDF document text
    • http://setategavatanag.rf.gd/smallest_bond_angle_in_xef4.pdfIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_6f19fd6aa6e2442d995ac19287ef1ffe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/koxejidiju.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/avadhuta_gita.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_115e79ae6e104c9682b2500ea21448b7.pdf?index=trueIn PDF document text
    • http://sepuxukejobome.epizy.com/barfi_songs_zip_file.pdfIn PDF document text
    • http://salajire.onlinewebshop.net/citizen_865_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/8676223086.pdfIn PDF document text
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_0ca97bcf68ae4a0a92ac70d41f3ca7bb.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_b31ca4e530824c4f8f1130581722624f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/24111661970.pdfIn PDF document text
    • http://vedaremix.epizy.com/frere_jacques_flute_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/89350284602.pdfIn PDF document text
    • http://vakogez.myartsonline.com/mirik.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_off00014823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14823 5340 bytes
SHA-256: 5259a8dc2457f2688a372ff9959a8ffd222d17bb900d53c78ad444a6763ab287
font_01_sfnt_off00015a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A5F 10948 bytes
SHA-256: b05c36ba688816b842aee70a62253a958c2e35536004c41f0f77b2fb70ac4729
font_02_sfnt_off00017fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FBE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f