Malicious PDF — malware analysis report

Static analysis result for SHA-256 936b0c5c43855bb6…

MALICIOUS

PDF

77.2 KB Created: 2021-02-16 13:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fc3dd0f9981061f15c2821d30b11f5df SHA-1: 9ccec0decc1d4bcacdf7d93d4b5d726a029fd24b SHA-256: 936b0c5c43855bb613812374f5aa5c24635266228a1a0effdb54b81ed9fa2795
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple external URLs, including one directly linked to the document's apparent content ('how does kaneki die'), suggests a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a lure to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=how+does+kaneki+die PDF link annotation
    • http://fbdirect.site/donesidowamovowupiwez07kj.pdfIn PDF document text
    • http://irisca.online/fukipapgsz5b.pdfIn PDF document text
    • http://legko.travel/rabbit_hole_whisky_pricev6z51.pdfIn PDF document text
    • http://srakan.space/manualidades_para_navidad_con_papel_aluminiohz110.pdfIn PDF document text
    • http://kibizife.iblogger.org/google_chrome_full_windows_xp.pdfIn PDF document text
    • http://app-3null.com/42901748018uaiku.pdfIn PDF document text
    • http://vodekageka.22web.org/kibonupenaxavorome.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/CksiiE0/vofikibapivoxebasolofus.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/fPjcjcj/wafuwigobajulevej.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/j9c9rgh/togufipefabukuxow.pdfIn PDF document text
    • https://cdn.sqhk.co/fonixoligem/BSjc9NZ/exponential_idle_supremacy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takurugilij/joravojimobuj.pdfIn PDF document text
    • http://mujunuge.rf.gd/sapanulataworotubef.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/67537639185.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/elder_scrolls_legends_beginner_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/crusaders_of_light_paladin_of_daylight_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/34540726519.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC91 4808 bytes
SHA-256: dbfd86c2e36569bf94d468da9cd1b57d81741dff3ef5f1282f55f4df378bbeda
font_01_sfnt_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 10692 bytes
SHA-256: 1d2133f132d540b327a7a24ecb2d21d07a65c0d8d1d1c7caa34dd091a0b8d6b0
font_02_sfnt_off000111e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E8 16344 bytes
SHA-256: dc620336aa769c766927a552749f6283a30952bf3238451f386faf844582b0a6

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