Malicious PDF — malware analysis report

Static analysis result for SHA-256 003d050274d5d9f2…

MALICIOUS

PDF

86.8 KB Created: 2021-03-19 13:14:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e258a731ba0ef01ce65de69f4afbd4b3 SHA-1: b00afa01f6a0be944de5831b9ba23710c3262366 SHA-256: 003d050274d5d9f286c04e8228c3748e6733d66f821f89ebf28e4a262a02a78c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism to deliver a malicious payload. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to download and execute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bologen.ru/award?keyword=access+a+ride+application+nyc+pdf PDF link annotation
    • http://barbanapoli.moscow/77251198332z5u9x.pdfIn PDF document text
    • https://cdn.sqhk.co/medukukekuke/4uiehcG/55503301672.pdfIn PDF document text
    • http://hotloveme.online/821537560181c05y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374359/normal_5fed336bcc6ec.pdfIn PDF document text
    • http://buzatukati.iblogger.org/37924329597.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/two_step_equations_with_variables_on_both_sides.pdfIn PDF document text
    • http://good-production20.site/rugatjvcxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_60344db955724.pdfIn PDF document text
    • http://trikotoria.ru/good_and_scates_validity_testf6hvd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_6038514b7e89a.pdfIn PDF document text
    • http://henrysavbr.site/how_to_memorize_2_look_ollhpf9v.pdfIn PDF document text
    • http://boldly-grow.com/33255629007xmnq3.pdfIn PDF document text
    • http://slimerecipe.org/auto_chess_apk_mod9snar.pdfIn PDF document text
    • http://antinomi.design/durogomavakanozusuz48d6f.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/long_way_down_film_cast.pdfIn PDF document text
    • http://kutagugiponapa.22web.org/change_apps_screen_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xalurubizud/dVibgf0/zokoxedumumujutimop.pdfIn PDF document text
    • https://cdn.sqhk.co/zetobazox/ggjaghK/ranubemon.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/knxjeie/ninja_blender_black_friday_2020.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://boxijekew.atwebpages.com/gosadotaxetefedinana.pdfIn PDF document text
    • http://wobalewir.epizy.com/what_is_limited_autonomy_mean.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/12869953902.pdfIn PDF document text
    • http://joveviziw.epizy.com/68115262501.pdfIn PDF document text
    • http://ruworala.epizy.com/the_heart_of_betrayal_audiobook_free.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011f1d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11F1D 19092 bytes
SHA-256: f5aff8c3891123f180f32941381949a42cd5afdd3021a9fa33c34033c42c0ac3
font_00_sfnt_off0000eb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1F 5028 bytes
SHA-256: d283e5cc1cd924511326092a322aa9b26b28e11001d6dbb3fbba9d14cace1011
font_01_sfnt_off0000fc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 10092 bytes
SHA-256: a05fb046414cbd9efca6a7184c3b93c7292f1bd7baa87b6df8750c380a906f81
font_03_sfnt_off00013ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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