Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e2b50db50a3d8c…

MALICIOUS

PDF

99.5 KB Created: 2021-01-21 15:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8a97b473263f2b4a9516c62133bd0f05 SHA-1: 1cc9baad91a0d54653347cef9cc22dfd5c7d786f SHA-256: e5e2b50db50a3d8c36fc43481638a8ee8974b22028ca65b0ad2b797566afcf13
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating redirection to known malicious infrastructure at 'ggtraff.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous links on disposable hosting suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=rhinoceros+ionesco+pdf+french In PDF document text
    • https://static.s123-cdn-static.com/uploads/4495999/normal_6005ce5864358.pdfIn PDF document text
    • https://nuduxojobiri.weebly.com/uploads/1/3/4/6/134629521/sadakovumu-dokufudepotefog.pdfIn PDF document text
    • https://jopulovi.weebly.com/uploads/1/3/4/2/134265775/tukek.pdfIn PDF document text
    • https://site-1176507.mozfiles.com/files/1176507/jatopulipav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f9ce0c3db99a.pdfIn PDF document text
    • http://kedusigodozop.22web.org/free_printable_alphabet_worksheets_for_1st_grade.pdfIn PDF document text
    • https://site-1168038.mozfiles.com/files/1168038/wevodetujuzadifipin.pdfIn PDF document text
    • https://site-1255529.mozfiles.com/files/1255529/answer_to_113_across_geography_crossword_clue.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/iiiaBhi/99019143064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5fa0c22e4b1c9.pdfIn PDF document text
    • http://wavarev.22web.org/film_bikeman_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/geChhNn/novenotesalejopigube.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/jcCjbgf/junior_project_manager_jobs_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f8c1281ced66.pdfIn PDF document text
    • https://mefanajumajadip.weebly.com/uploads/1/3/1/6/131637152/7020683.pdfIn PDF document text
    • https://site-1177929.mozfiles.com/files/1177929/truck_seat_upholstery_repair.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taguramol.rf.gd/pufumejepabebofi.pdfIn PDF document text
    • http://vokulokunupada.epizy.com/goxetisanuxajuzosum.pdfIn PDF document text
    • http://kititone.epizy.com/100_cotton_fitted_sheet_only.pdfIn PDF document text
    • http://boripodadup.epizy.com/wurevojinutikededifata.pdfIn PDF document text
    • http://puzexexaniledow.epizy.com/babble_synonym_formal.pdfIn PDF document text
    • http://mapexas.epizy.com/ijazat_movie_songs_ming.pdfIn PDF document text
    • http://jabepujun.epizy.com/bomberman_multiplayer_android_bluetooth.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_off000142b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142B1 5008 bytes
SHA-256: 5ede78a30acbbfe5ffb329dd3ae8ecc10d40f4a70bd64a7696b620c5eedf3422
font_01_sfnt_off000153bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153BD 14360 bytes
SHA-256: 1a57fe894d2868164d7013475109eeb8ecfda6a82e7ed3b03055e950a7795ea6

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