Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c544d1e95b868e…

MALICIOUS

PDF

84.2 KB Created: 2021-04-26 22:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 16a1dc1f04600153d917a8b8613b5da1 SHA-1: 5624e39ee4aa70e8ea3b4101f5cde58028bcc641 SHA-256: 07c544d1e95b868e02b7a8c67b9168abcdad42d53fac8e7684d602aadf996a91
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://zajinet.ru/strik?utm_term=fz+250+cc+price+in+sri+lanka PDF link annotation
    • https://cdn.sqhk.co/tumitibira/ohbjfU2/gambero_rosso_di_mazara_prezzo_al_kg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_60198b7b3fbbe.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/Ojf9jes/sevupizivam.pdfIn PDF document text
    • http://wizimesataw.22web.org/71366614257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481994/normal_600b23ffd4edc.pdfIn PDF document text
    • https://vopupina.weebly.com/uploads/1/3/1/0/131070761/josopowiwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_6038420314a9e.pdfIn PDF document text
    • http://xawaliduza.iblogger.org/lista_de_exercicios_geometria_analitica_area_do_triangulo.pdfIn PDF document text
    • https://tenuzovew.weebly.com/uploads/1/3/0/7/130740022/470a46be.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/gfJidQ0/6826421336.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/quran_arabic_and_english_transliteration.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0f7a2101-273c-4f7f-b1fd-079d1ad923c1.filesusr.com/ugd/a7ea6f_586832e365c1413c95a2ccab7f826ec6.pdf?index=trueIn PDF document text
    • http://fipivolakiwupod.rf.gd/free_lens_flare_png.pdfIn PDF document text
    • http://sesumedafe.epizy.com/adobe_reader_for_windows_10_professional_free_download.pdfIn PDF document text
    • https://ff102949-4c65-4b7b-925c-ea9a98d885fa.filesusr.com/ugd/7a16bb_99ee97e6dedf4ecc8e3b33e1f0bbb5bd.pdf?index=trueIn PDF document text
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_f64ad0f8209a470e980f850556bf9a30.pdf?index=trueIn PDF document text
    • http://raviwazepoloxav.rf.gd/camtasia_8_user_guide.pdfIn PDF document text
    • http://najorenowodume.epizy.com/focusrite_scarlett_6i6_2nd_gen_technische_daten.pdfIn PDF document text
    • http://wadepexarupuwa.rf.gd/75275275833.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 5392 bytes
SHA-256: a6ff4932a9664a2286a80006ab1a01ea387997be7d622c82fc11b629a8c233af
font_01_sfnt_off0001058a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058A 12136 bytes
SHA-256: 1b19da1592377861ce6022a5d58a7a1bd8b9fc0422c40133d812078ce1353e82
font_02_sfnt_off00012e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E54 16168 bytes
SHA-256: 2732ee4e6fc52e1f0b465c06e50f5b132505da02cc6e93ae85b7d8375cfdad8f

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