Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43681c49e0e5bc2…

MALICIOUS

PDF

83.6 KB Created: 2021-03-31 02:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ee12620a535369f64f975b0dc21a0bde SHA-1: 51adeb12d7f036b16f06cfc77681338e5def2514 SHA-256: d43681c49e0e5bc24eb6be510717ef1cda2f340a4bff191cff78e66196b982c5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://crophysi.ru/wix?keyword=who+is+eurylochus+in+the+odyssey PDF link annotation
    • http://mesutilixuta.sportsontheweb.net/xezixezipabixavi.pdfIn PDF document text
    • http://mutuseki.22web.org/used_corrugated_metal_sheets_near_me.pdfIn PDF document text
    • http://nomiwiturej.getenjoyment.net/bulletin_template.pdfIn PDF document text
    • http://gixapedotamerow.mywebcommunity.org/spoken_english_book_in_gujarati_free_download.pdfIn PDF document text
    • http://nobupefigobir.iblogger.org/destination_delf_a2.pdfIn PDF document text
    • http://normaa-id.com/boss_audio_r1100m_riot_review27uqt.pdfIn PDF document text
    • http://igbusinessabouthelp.com/68826262684bhk9g.pdfIn PDF document text
    • http://mosquito.codes/956416831868h5ho.pdfIn PDF document text
    • http://50offstore.info/2010_lexus_rx_350_nada_valueozj3r.pdfIn PDF document text
    • http://brumbum3.xyz/14643337184wxpvo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_b4729c0a34e04aa0ad5e951c4967fa83.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_ba5ad0e9c8994a6e8db84fbeda03563f.pdf?index=trueIn PDF document text
    • http://radikabo.rf.gd/civil_engineering_drawing_text_book.pdfIn PDF document text
    • http://butadiviwev.rf.gd/77278165678.pdfIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_cfabf9a4944f4598b2369d214ab9e50f.pdf?index=trueIn PDF document text
    • http://wulemut.epizy.com/laromeg.pdfIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_a674d44986444198abf0efb6c64474e7.pdf?index=trueIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_32edcef180f7438f95eda6b31922dbbb.pdf?index=trueIn PDF document text
    • http://rowomasogig.epizy.com/metro_2035_ending.pdfIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_b4c6238367d941bb9eda426a1c8824c3.pdf?index=trueIn PDF document text
    • http://diwigivexuvobe.epizy.com/cinderella_2015_disney_movie.pdfIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_a8ae8be27a5b4cc4b176f32ca54b3bdd.pdf?index=trueIn 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_off0000e9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A4 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000f3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E7 4932 bytes
SHA-256: 5d716cd801768dc9f93e39598f8f635697ae87225afc189f3b55217a514782e3
font_02_sfnt_off000104ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BA 10832 bytes
SHA-256: aba46b5d3999f0f62e031cdb54ae922882dc2f7b1c4f93fecacc6ffc2c4907b1
font_03_sfnt_off00012a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0D 16280 bytes
SHA-256: b7643587a3065bb39b820ff241bd1f70333816ab87bfbe1e73ae85168fb2d4e7