Malicious PDF — malware analysis report

Static analysis result for SHA-256 df130ced132d17df…

MALICIOUS

PDF

79.0 KB Created: 2021-04-06 17:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f149da806ba35aceac1f5af89246d9e4 SHA-1: 22b5c6225dc1f0c326be2665cbf17010efa5ed9f SHA-256: df130ced132d17df30a903ce95c44644feeb139b32a4a9e1426ecd21a2c21cb8
146 Risk Score

Malware Insights

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

This PDF document is classified as malicious, likely a phishing lure. It contains numerous embedded URLs, many pointing to disposable hosting, and one specific URL that appears to be a redirect for 'adobe reader software free for laptop'. The document body is heavily obfuscated, preventing a clear understanding of its direct intent beyond the embedded links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jacksth.ru/123?utm_term=adobe+reader+software+free++for+laptop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463794/normal_5fd1d607b1d40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370097/normal_6001b89836bf7.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/Diehejj/true_skate_complete_trick_list.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/c3B9mHj/gunship_battle_helicopter_mod_apk_revdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484639/normal_60621ffbc50f4.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/ibhfjd6/17005693656.pdfIn PDF document text
    • http://fezomoworiva.22web.org/lemajet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416791/normal_606816cf2056b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476007/normal_604ba0364fca6.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/rjaggt9/qr_code_scanner_in_android_studio_example_github.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dfdffa4-017f-45a7-a3e6-5155dafb2bba/the_other_side_of_midnight_dvd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b5fb84-d22c-46e5-b381-f715e3432a17/ultimate_mortal_kombat_3_sega.pdfIn PDF document text
    • http://vimotivugepo.epizy.com/turkish_arabic_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f977d261-0579-4795-972d-75548c57bfcd/vatuxezuvunanepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1137d70e-7fcb-49e4-86ea-c3066968ba8c/bosch_axxis_washer_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/afshan_zebi_video_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db1c528a-522c-4991-930b-52e60bd4d322/57891862328.pdfIn PDF document text
    • http://bawexoji.rf.gd/nosepaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd0f5c4-0b38-4179-a9ab-a027c3b4e23b/fuzizusen.pdfIn PDF document text
    • http://torowenakatum.epizy.com/first_grade_geometry_worksheets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/2014_cadillac_srx_service_manual.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_off0000f757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF757 5256 bytes
SHA-256: 16523c7f4cb5069406ba74c994d98402f9e7a1018d58994ee6cda99d627e9a61
font_01_sfnt_off00010952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10952 10928 bytes
SHA-256: cfcb572c3402629e2e95ecdaa2ac2e9db56b2016c8e0a21053c29b8adf6a3233