Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a0140fb1984e05…

MALICIOUS

PDF

76.3 KB Created: 2021-02-27 18:15:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 38e39ef4c149744be07a3871c4c86b16 SHA-1: d878876d9f8bf8163b4071d905fd2a4d6563ad83 SHA-256: e4a0140fb1984e058972c380a4f23822ebc9597a00130ad6330546e6a67f0bf7
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which is disguised as a helpful guide but leads to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9460

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://xezojetit.ru/award?keyword=how+to+add+watermark+on+pictures+in+word PDF link annotation
    • https://cdn.sqhk.co/pamavunawi/jh1mkih/milanote_app_android.pdfIn PDF document text
    • https://didegesub.weebly.com/uploads/1/3/2/6/132681352/vabaru_dodividibeg.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/tovipapubebatumas.pdfIn PDF document text
    • http://sokelekife.iblogger.org/bach_piano_prelude_sheet_music.pdfIn PDF document text
    • https://nulixosur.weebly.com/uploads/1/3/4/3/134311840/449329.pdfIn PDF document text
    • http://fijixedi.22web.org/acrobat_reader_for_windows_10_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/cjejeje/31999102527.pdfIn PDF document text
    • https://sojimivur.weebly.com/uploads/1/3/4/8/134883767/4cb0a62bad6b5.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/hajjwus/24155405322.pdfIn PDF document text
    • http://wuzotevoxed.22web.org/template_birthday_party_invitation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ginutu/suvaxunuruwiwino.pdfIn PDF document text
    • http://tizoraponu.rf.gd/9946282974.pdfIn PDF document text
    • http://pixelub.rf.gd/chhichhore_subtitles_english_free.pdfIn PDF document text
    • http://somizifiwij.epizy.com/11203478304.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/59281181164.pdfIn PDF document text
    • http://sokiguxesixup.epizy.com/what_does_sum_up_mean_on_bank_statement.pdfIn PDF document text
    • http://ludujefu.epizy.com/a4_sheet_height_in_pixels.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/asus_k42f_bluetooth_driver.pdfIn PDF document text
    • http://nosatezugizixi.epizy.com/baofeng_uv_82_manual_programming.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 5188 bytes
SHA-256: 1846ad2625311d8475a9874d779221d144b8fbf1382ade69b030e369ce67b43b
font_01_sfnt_off0000fb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB80 10052 bytes
SHA-256: 582972557fb952d4f92962f7a3f6e7ddffd473196f0b0d1cf3b441a6ca7d525b
font_02_sfnt_off00011dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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