Malicious PDF — malware analysis report

Static analysis result for SHA-256 561c5e72a2384627…

MALICIOUS

PDF

107.5 KB Created: 2021-03-09 20:14:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1e848b4d8074701f8c01ca5a434079a7 SHA-1: 828f6ad7da9e5a2abe2c8b37ec4166b51928eb17 SHA-256: 561c5e72a23846275bb483be812c23d6fb5dc75df355cabb0d7c4a0c861d2c67
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://jacksth.ru/award?keyword=stability+of+carbenes+pdf PDF link annotation
    • http://juwijosij.iblogger.org/circulation_acc_aha_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/ihia9gi/87706675874.pdfIn PDF document text
    • http://bigops.fun/68106720479cp7u2.pdfIn PDF document text
    • http://poroda.site/ragodedosotibikuofncj.pdfIn PDF document text
    • http://zafuwozemupojaw.22web.org/97629940646.pdfIn PDF document text
    • http://goodshopsales.xyz/714313917525icet.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/13259306095.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/simbolos_de_los_diagramas_de_flujo.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/hfQibgi/winilinugeweguzoxi.pdfIn PDF document text
    • http://kind-insta.site/bird_racing_simulator_eagle_race_game9zlgq.pdfIn PDF document text
    • http://begemotiks.fun/chartered_market_technician_books_free8so0o.pdfIn PDF document text
    • http://natgood.space/sivadalanasaduratesobenif9jt7.pdfIn PDF document text
    • http://eurofamily.pro/39082918644dgm52.pdfIn PDF document text
    • http://republvinb.fun/97347645770ahp4y.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/MhjSigf/root_android_phone_without_pc_apk_download.pdfIn PDF document text
    • http://ruvikuvi.mywebcommunity.org/les_vangiles_apocryphes.pdfIn PDF document text
    • http://takinodexitimax.22web.org/how_do_you_dispose_of_books.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/hZsZHF5/55792792608.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/Q6bgjVj/lagu_eisner_nala_pesan_nuju_sulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://redifigikutusoj.myartsonline.com/33178489778.pdfIn PDF document text
    • http://kizebemifovexe.rf.gd/dinamap_carescape_v100_manual.pdfIn PDF document text
    • http://jofikuv.atwebpages.com/how_do_i_tell_what_year_my_briggs_and_stratton_engine_is.pdfIn PDF document text
    • http://tezipibuboxigo.epizy.com/terraform_azure_storage_account_key.pdfIn PDF document text
    • http://tefotesibeto.epizy.com/54818155298.pdfIn PDF document text
    • http://dixasimoxipux.rf.gd/medical_microbiology_book.pdfIn PDF document text
    • http://zojasofox.epizy.com/woxikukilotozofide.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_off00016838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16838 5496 bytes
SHA-256: ff5b85edf6796a5e4b6144d6163b17242ee277029db99f4027a5583051c46584
font_01_sfnt_off00017afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AFA 11008 bytes
SHA-256: eac71f54a0d1ac7df69a9f8c8fafa8af98acb51ecd7b32dcc0930cf942f7422d

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