Malicious PDF — malware analysis report

Static analysis result for SHA-256 a000c46ab4290352…

MALICIOUS

PDF

144.6 KB Created: 2021-04-09 12:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fd76e09cee5e414c9ff1532bed4545cd SHA-1: 1861a65f1e2ff2cde9be059393cdb683e1c7c7c1 SHA-256: a000c46ab42903527bee4e4a8d9cb0358933296a6850e861256b7bc0237be2cf
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous external URIs, including one that appears to be a redirector to a disposable hosting service, suggesting an attempt to deliver a secondary payload. The document body, though heavily obfuscated, contains text related to downloading MP3s, which serves as a lure for the malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9733

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=99+names+of+allah+with+urdu+meaning+and+benefits+mp3+free+download PDF link annotation
    • http://chestlune.online/laxotarefibegubeviwuxafabx2mik.pdfIn PDF document text
    • https://nowepokuvex.weebly.com/uploads/1/3/2/7/132740584/zebamigenubamoxip.pdfIn PDF document text
    • http://zotokolumo.iblogger.org/mufipovejowalitigoxo.pdfIn PDF document text
    • http://cleaner-inn.club/wahl_hair_trimmer_directions2c9ii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_605ca8317ef2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500446/normal_5ff8fcee7f1e8.pdfIn PDF document text
    • http://xenotobewaf.22web.org/6881331889.pdfIn PDF document text
    • https://zobigitesi.weebly.com/uploads/1/3/4/6/134691723/1473300.pdfIn PDF document text
    • http://wunazaro.22web.org/pet_animals_worksheet_for_grade_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_22a9c58f1bb2463892dca1e701169537.pdf?index=trueIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_81a5f1b1749d4d039a3c822e2190c8d1.pdf?index=trueIn PDF document text
    • http://mezezix.rf.gd/what_is_the_role_of_religion_in_society.pdfIn PDF document text
    • http://dupikupujetilu.rf.gd/song_chitta_jaggi_sidhu.pdfIn PDF document text
    • http://laneneloko.epizy.com/buku_akuntansi_manajemen_kamaruddin_ahmad.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off000202a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x202A1 20004 bytes
SHA-256: d7a601bb49498a9fcedce02b0dc07507051e20081076cb64fbf737d35b6b3edf
font_00_sfnt_off000140b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B9 17788 bytes
SHA-256: 59153d4facbddfd2ea5560ff24357d1d986bbdf511cc8fe14566a6e049e67a3f
font_01_sfnt_off0001796f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1796F 5796 bytes
SHA-256: 12b8da7b766df72f61b718d4f5e908315be3415e7c15d5eb66db922973371714
font_02_sfnt_off00018cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CFA 8792 bytes
SHA-256: 81df55992307e083acc0e9e16a8dab603eaf1069cbb1b237a5477b60699c0619
font_03_sfnt_off0001a444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A444 10716 bytes
SHA-256: 14125ff7e26d0fca533176b16f3867440d128f4d7a0a55023e71c4c322c17ac9
font_04_sfnt_off0001c614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C614 1640 bytes
SHA-256: e2a8cf3ae90b9a82ebf0add2d91a9d1ec9768ccc63ce40db21e7dac6586adc8c
font_05_sfnt_off0001ce51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE51 16592 bytes
SHA-256: e111320abba164630e54a4c2556e73ecf5aab9e324ce6556b9bcec8689f701d7
font_07_sfnt_off0002247b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2247B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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