Malicious PDF — malware analysis report

Static analysis result for SHA-256 53dc61921d12fca5…

MALICIOUS

PDF

78.8 KB Created: 2021-03-04 11:25:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5df7152f1184ff563ca8e74908b4c0d3 SHA-1: d1d08763f2fdcd07ed752e89d4ab899f911aec98 SHA-256: 53dc61921d12fca5d58847cba6c27c262babf5280e250807d7b634f140a52a43
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links, specifically pointing to 'dafemum.ru'. The ML classifier and ClamAV also flagged this PDF as malicious, likely phishing or a trojan. The embedded URLs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dafemum.ru/wix?keyword=altar+of+zeus+olympia In PDF document text
    • http://gamukanemafutu.mywebcommunity.org/fasuliliduwuvulofosixof.pdfIn PDF document text
    • http://bimoxalobabi.iblogger.org/probabilidad_y_estadistica_schaum_cuarta_edicion.pdfIn PDF document text
    • http://rexirututesopew.iblogger.org/cordless_phone_4_handsets_without_answering_machine.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/how_to_operate_digital_multimeter.pdfIn PDF document text
    • http://vivudanu.scienceontheweb.net/gaketi.pdfIn PDF document text
    • http://matodobotosirom.66ghz.com/newton_s_second_law_problem_solving_answers.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/lizijufadeliwejoxuzakif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nugikefabepumuk.epizy.com/active_and_passive_fire_protection.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/adcom_gfp_555_ii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/96649914668.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/sitibifozitebenu.pdfIn PDF document text
    • http://kutifakibidi.rf.gd/35786115675.pdfIn PDF document text
    • http://feferabi.atwebpages.com/49672216056.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/ifs_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/pathfinder_2nd_edition_character_sheet_fillable.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/soperowufelik.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/fivojilomid.pdfIn PDF document text
    • http://ligozuwi.rf.gd/buzuwajuxiwi.pdfIn PDF document text
    • http://pifimat.epizy.com/ocr_b_chemistry_student_book_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/xilinx_kintex_7_user_guide.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_off0000f7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 5188 bytes
SHA-256: b45a34b072c61131eb8b74648b159cf1d9147fc23ba9677898443e0db856ec01
font_01_sfnt_off00010984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 10384 bytes
SHA-256: fa4fb91cdf23f20f7ec043201888bc23d3f4f663fed6b1f743876206fc817c10

Open this report in the interactive analyzer, or submit your own file for analysis.