Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fb72c8cffbdbc5…

MALICIOUS

PDF

76.9 KB Created: 2021-04-02 19:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcaa13d24527572c584bc729f7e80bff SHA-1: cd1671ada21b42e807263afcea9e234cbc5fd2d8 SHA-256: 35fb72c8cffbdbc5a678a36f455cd5df9a69cbb101948179124090c5e67a8cdb
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to book summaries, likely intended to trick users into visiting the malicious URL. No scripts were extracted, but the presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=the+giver+chapter+6-8+summary
    • https://cdn-cms.f-static.net/uploads/4420039/normal_6018f67b14c17.pdf
    • http://opencabinets.xyz/how_to_remove_graco_contender_65_cover48c8f.pdf
    • https://cdn-cms.f-static.net/uploads/4450625/normal_601fa5425fdeb.pdf
    • http://hamlikjorettoop.ru/where_can_i_learn_transcendental_meditation_for_free4mgk9.pdf
    • https://cdn.sqhk.co/duponetix/05Kghhe/75179033200.pdf
    • http://jujovobima.getenjoyment.net/does_ashton_kutcher_have_a_brother.pdf
    • https://cdn.sqhk.co/jujadiziga/Bzgebhd/throne_of_glass_series_book_1_read_online.pdf
    • https://cdn.sqhk.co/fagijopi/DCnifMB/gemobeme.pdf
    • https://cdn-cms.f-static.net/uploads/4387243/normal_6047b11cbd4ad.pdf
    • http://lebizifijafaxim.medianewsonline.com/apple_a1392_setup.pdf
    • https://cdn.sqhk.co/wumigapinido/djhzMDb/zodifigo.pdf
    • http://richmaya.site/35226102654hpkxv.pdf
    • https://cdn-cms.f-static.net/uploads/4369511/normal_605ca93acc455.pdf
    • https://cdn.sqhk.co/lokabawopup/byigjcG/xuveli.pdf
    • http://cardioactiveuficiale.site/96604271092qfd3r.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bomupi/pros_and_cons_of_a_nuclear_power_plant.pdf
    • http://jalebuvubo.myartsonline.com/58018708695.pdf
    • https://s3.amazonaws.com/bolovopizonuki/how_to_pair_plantronics_3100.pdf
    • https://s3.amazonaws.com/pazerogasarinu/xupilepovesived.pdf
    • http://vakizonozajaxe.onlinewebshop.net/vba_programming_language_tutorial.pdf
    • https://s3.amazonaws.com/bojafazes/xevukofelu.pdf
    • https://s3.amazonaws.com/tuxenipup/how_to_read_violin_notes_for_beginners.pdf
    • https://s3.amazonaws.com/dazifozixawus/bottom_navigation_bar_in_xamarin_forms.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f063.bin
2010d49793b497ef346d0058568b33515c73b9ce8a9e5789003c6ecfe6a43bfd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 5804 bytes
font_01_sfnt_off00010414.bin
2149b0aad75aba88f864f6b9803ea7d45b68fb69c30a0e712be9a663e7a8eab7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 9848 bytes