Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b377f3683bde24b…

MALICIOUS

PDF

83.1 KB Created: 2021-02-16 03:26:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0279fb1bea460907d05f63789d134bd5 SHA-1: 3a50a606b71debd79ae4088790a23b4899a052a5 SHA-256: 1b377f3683bde24b4fad9f0f0a8abafc41522385060a58965107f22f8c4b758c
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with 'https://maypoin.ru/wix?keyword=formulas+de+mrua' being a primary indicator. Although no scripts were explicitly extracted, the presence of embedded URIs and the nature of PDF malware suggest it likely attempts to redirect the user to a malicious site for further exploitation or phishing. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=formulas+de+mrua PDF link annotation
    • https://cdn.sqhk.co/ketadasogob/Etphgxb/knifeless_tape_3m.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/dziTIQg/music_video_with_rocket_launch.pdfIn PDF document text
    • http://merishwheelrecords.com/mobile_legends_kagura_guidec88s6.pdfIn PDF document text
    • http://shmelev.pro/gibozibivikidetupipudugapa02p.pdfIn PDF document text
    • https://cdn.sqhk.co/besimiwi/ujgRjbw/finding_blue_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fudimesa/heuXhTB/desert_survival_shooting_game_offline.pdfIn PDF document text
    • http://reform-st.ru/best_piano_bookrlbsn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447434/normal_5fe2a26e385b5.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/dihjcgg/vintage_snake_eyes_golf_bag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368489/normal_5ff175b2671f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473384/normal_6013ba24aeffe.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/jhcPw2S/49988694617.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
    • 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E2 4576 bytes
SHA-256: ab1aa231311657dd4bb2faa00543f39edd6859ddb78e7bdb5e0bd69409223ac7
font_01_sfnt_off0000e61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61E 6460 bytes
SHA-256: e53669f23e8431e49ef982c3515df70ec05f623ef46737d483c6fca0c1c9cd21
font_02_sfnt_off0000f5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E9 11396 bytes
SHA-256: b639f7a246289db77a9a6eedeee763eb9a663563e202a57d19ab901a7bff4894
font_03_sfnt_off00011c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3D 16124 bytes
SHA-256: d2f8158d3333f9244589fcebd2e72f9faca993d5e509b9ee1f7d000beeeaa081
font_04_sfnt_off00013135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13135 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.