Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d5bc2aad343613…

MALICIOUS

PDF

82.3 KB Created: 2021-03-15 16:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 628744f77d9a26e538245b26ca3bc35e SHA-1: 4e5f8a171240129c92ece6a81cccdeba303bfc53 SHA-256: c2d5bc2aad343613da2652f7e4d2646a89c156754a59e64a19a0b34c9b5f08b7
116 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for a specific document, likely to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the callback phishing heuristic suggest a social engineering attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://botokaw.ru/award?keyword=soyal+access+control+manual+pdf PDF link annotation
    • http://trickyturkey.com/speaklar_english_speaking_practice_app_downloads21fa.pdfIn PDF document text
    • https://cdn.sqhk.co/satovepato/dibjfPT/navy_field_2_download_free.pdfIn PDF document text
    • http://kekanavaresem.iblogger.org/gilabupuz.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/FhjaSjf/safe_notes_app.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/XljeLjh/memalatazaji.pdfIn PDF document text
    • http://fullpisetc.ru/58209886146xh04d.pdfIn PDF document text
    • http://moratelusubuzol.22web.org/93007713039.pdfIn PDF document text
    • http://ledoxune.22web.org/83724246500.pdfIn PDF document text
    • https://cdn.sqhk.co/vexapalas/QGwktgd/18817711974.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/m24mida/52678121250.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/dIx01f9/working_solar_system_science_project.pdfIn PDF document text
    • https://cdn.sqhk.co/jixavome/gcyCWTF/cube_surfer_online_unblocked.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/forupokisip/6354322515.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/ireport_designer_not_launching.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/paxetobutepikewudoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/94805981414.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/percy_jackson_the_sea_of_monsters_chapter_16.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/chromatic_guitar_tuner_versi_lama.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/chicago_style_font_size.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/casio_g_shock_rangeman_tough_solar.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/audio_books_free_motivational.pdfIn PDF document text
    • http://dowavatig.rf.gd/inelastic_buckling_of_columns.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/como_fazer_backup_android_para_ios.pdfIn PDF document text
    • http://fopebuzab.epizy.com/nebodigadupek.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://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_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 5340 bytes
SHA-256: fe0b1dae0794aa71a810a8da17241084ab3456bcb24b62503988bd72523d3fc7
font_01_sfnt_off0000f268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF268 11176 bytes
SHA-256: 91e1b9189a26abe0846f4a461bdcf9f761c13a9a21042229f0696155a0cade12
font_02_sfnt_off00011850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11850 16160 bytes
SHA-256: b91ebbfc40a94f10b2fcfc4d08542e4cd4fc38dcff43bcfefe5d572695fcce17
font_03_sfnt_off00012d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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