Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7fec6d18147f2d…

MALICIOUS

PDF

95.5 KB Created: 2021-03-15 07:31:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f388ff367e9e9af504f7e0eb512e1609 SHA-1: aa0a67447617c235b7b90c1a10b01919a9f6e31a SHA-256: 7c7fec6d18147f2d36f698159214c72874e28d6485b4ae0d94f8188ade77c30f
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or potentially malicious domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/award?keyword=burger+king+menu+prices+south+africa+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422147/normal_6041bc2b1b6da.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/maxilasenab.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/sharepoint_2013_view_workflows_in_progressyvbu9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_60252cd301865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_603e2585e9203.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/SkhhPij/love_quotes_from_the_bible_images.pdfIn PDF document text
    • http://cheapkeys.site/ruvusotasewvrp33.pdfIn PDF document text
    • http://manovina.mypressonline.com/rasufowowobanin.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/46842239195.pdfIn PDF document text
    • https://cdn.sqhk.co/ditutafewaw/iajgBij/bebuzolesijozivurasususok.pdfIn PDF document text
    • http://stassikorskyi.com/catanzaro_informa_acqua_oggi0pqv8.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/lFO8njc/baby_bum_nursery_rhymes_sleep.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/hdEkD24/the_walking_dead_movie_1995_watch_online.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/113393523.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/pdf_file_converter_to_word.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475715/normal_602143db9b53d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486742/normal_5fc9e831a0330.pdfIn PDF document text
    • http://tafakiduwav.scienceontheweb.net/jujabomopupakedilaso.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/libros_para_aprender_a_tocar_guitarra_gratis.pdfIn PDF document text
    • http://50offstore.pro/nedumopedofipozixisuwanij1tbq.pdfIn PDF document text
    • http://dosefokinuvulo.mypressonline.com/approach_method_and_technique_english_language_teaching.pdfIn PDF document text
    • http://bawimip.sportsontheweb.net/difference_between_monocot_and_dicot_stem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lewinozed.atwebpages.com/how_to_get_the_area_of_an_isosceles_trapezoid.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/harbor_breeze_ceiling_fans_installation_instructions.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 5924 bytes
SHA-256: dfe483294605379b5fb6fd58f595ff3d8dcce15902e411d6a949ea517b9ebb6b
font_01_sfnt_off00010a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A99 10552 bytes
SHA-256: 3e0d8bae91c2f5ed5da1bcae25eb8f8eaa78baddad749e6dbaa7b434e6c158ab
font_02_sfnt_off00012d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D00 12348 bytes
SHA-256: bf7040805c65f512dc056904b10a61dd1e72a8c0988236eacb7cf763f96ab39a
font_03_sfnt_off0001569a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1569A 17296 bytes
SHA-256: c7816da53d2af28df1527ee918990fe636413f56be1ae4c3fa04095a3d2af2dd

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