Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3c42503f456287…

MALICIOUS

PDF

93.1 KB Created: 2021-03-20 02:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e26a0676ce89d6f86146c670a231eca2 SHA-1: e74521262a7f777288c328909887b19d5fc0d67c SHA-256: 3b3c42503f4562871bbe6a44b2f14bd631e6964409362f4d9ae48c5fcf5cd0c8
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure align with techniques used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • 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.
  • 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://xezojetit.ru/wix?keyword=guacamayas+de+leon+guanajuato PDF link annotation
    • http://compte-cmbretagne.best/go_tell_it_on_the_mountain_novel_charactersjsmqe.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/hhihjgg/real_tron_light_cycle_for_sale.pdfIn PDF document text
    • http://gabutetidik.22web.org/25997061700.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/Ejc94UJ/94890891214.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/igmgiSv/subway_surfers_unblocked_games_at_school.pdfIn PDF document text
    • http://itnegozio.info/kaththi_video_songs_hd_freeid3cu.pdfIn PDF document text
    • http://thedopemarketing.com/niwoxuwawaii14g.pdfIn PDF document text
    • http://apkweb.net/diff_between_viral_and_bacterial_conjunctivitiskccx6.pdfIn PDF document text
    • http://cethq.xyz/how_to_use_cook_time_on_ge_ovenjnddn.pdfIn PDF document text
    • http://toxaxugepevu.iblogger.org/75791123157.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://bexumasifawej.epizy.com/56380089658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76c3e54-647e-45ba-9b88-ecb11690d85d/the_bronze_bow_study_guide_progeny_press.pdfIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_406b5d0d81944ffb964375c23e3e7220.pdf?index=trueIn PDF document text
    • https://af8e4364-7f8a-45ec-af3e-d69da1c27fbb.filesusr.com/ugd/12c36c_0ed2902bca8947348a97af82045b9875.pdf?index=trueIn PDF document text
    • http://fevovamebabeji.rf.gd/11213854459.pdfIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_0a420e9dfebe488f8e5e6b57059cd535.pdf?index=trueIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_1ccc31a6e2d34edbaf1a294d88bc8ba2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba094a17-c475-4744-b1cb-59269b1a604d/which_sat_biology_book_is_best.pdfIn PDF document text
    • http://titasukutisun.epizy.com/47551243595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df28fe7c-7310-428c-8cd9-f647a31c6c56/97255628051.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_7066c76a72944a3cb5ea6efd1cc64078.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e8b03e-39c7-4b51-8c95-3768d32854ca/65251281725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f8f6fb-090b-4e68-8acf-327944f61e17/roman_catholic_bible_download.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF846 3056 bytes
SHA-256: 69af8e147acd4ce2e7a00d68a854e0936fd434da26172ca330cef86f12173931
font_01_sfnt_off0001033d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033D 5372 bytes
SHA-256: 4821358f7186e8bb5eab875fc21a523f4e5e9472d7f88c06357c4064d049a687
font_02_sfnt_off0001157c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157C 6148 bytes
SHA-256: 4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157
font_03_sfnt_off0001255d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255D 12044 bytes
SHA-256: e09c2a5147c50e628d0916f88aeb62ac1f5c1f037e9919858efefd719a904ec2
font_04_sfnt_off00014ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CCD 16684 bytes
SHA-256: 4cd55fee6c52bbab32ed20b0b25846bff407090075fa0ab45dc9808449a8eeb0

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