Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c2947f54920069…

MALICIOUS

PDF

135.6 KB Created: 2021-03-18 03:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7ecb6cd4ace07d486d8bdc6c015b832b SHA-1: 9175a598b3d89bbbc497a714f7242eb731d22ee4 SHA-256: d5c2947f549200696e6a8f93cda7a042ca92c945be100a3c33c8cd29e1f61df4
126 Risk Score

Malware Insights

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

The sample is a PDF file that contains numerous embedded URLs, many of which point to disposable hosting or potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm tactic, aiming to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://fokemale.ru/award?keyword=astm+a53+a53m+07+pdf PDF link annotation
    • http://lusolakidareve.mywebcommunity.org/82187191713.pdfIn PDF document text
    • https://cdn.sqhk.co/xevezele/Yhe6lhe/cbse_guide_app_class_11.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/warufonurubodazamex.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/ifAqsje/21628478313.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/bTiijis/14457370141.pdfIn PDF document text
    • http://tameeniraq.com/agnisakshi_serial_song_telugu_naa_songstbmv6.pdfIn PDF document text
    • https://cdn.sqhk.co/nilofixogezu/jjbm8RF/calculus_ii.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/gicgjgf/wood_cutter_saw_price.pdfIn PDF document text
    • http://lamovingcompany.com/aluminized_steel_sheet_for_sale2z8ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77abcf6a-1f47-4233-a5f7-28832101be0a.filesusr.com/ugd/e29e5c_37ea5da0384f4bc9a8cf0f16e6486548.pdf?index=trueIn PDF document text
    • http://pilisabewagedix.epizy.com/dunamozumorera.pdfIn PDF document text
    • http://pasobopupolom.rf.gd/wozud.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/norawajokivive.pdfIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_48dcd3dea0164af8ba3d97878106187c.pdf?index=trueIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_8ed2224c74ee47fab83eda9878e52b77.pdf?index=trueIn PDF document text
    • http://tugevajelijivo.rf.gd/stop_walking_on_eggshells_audiobook_free_download.pdfIn PDF document text
    • http://lebozid.epizy.com/b_h_s_c_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/72998514624.pdfIn PDF document text
    • http://mafulapovura.epizy.com/nuwaxi.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_259abaa484e24926837d876003b00e2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fukepez/historia_de_la_contabilidad_en_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/kayla_itsines_bbg_1.0_vs_2.0.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_off0001d2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2A5 5560 bytes
SHA-256: 35431f2379d551ec2642c4ed7a77b7de51be4ee50b2e94cabcfcbad3e8460229
font_01_sfnt_off0001e588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E588 13068 bytes
SHA-256: 4155bc167cb46f2f645003e91e977409b984d4446da4cfb8201b1bff59480ae5

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