Malicious PDF — malware analysis report

Static analysis result for SHA-256 8272548c29b5f06a…

MALICIOUS

PDF

82.1 KB Created: 2021-06-08 07:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e4035ac5c39662fcda122b78b4fbc214 SHA-1: 5019ffd14c94575bb38de695ade1cbd853f4f837 SHA-256: 8272548c29b5f06af0aba3704c9db9f55c1a7200a98ef3b3763136d6483c6269
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL and numerous other URLs point to a link farm designed to redirect users, likely for downloading modified applications or potentially malware. The document body, though heavily obfuscated, contains references to 'download dragon rise of berk mod apk terbaru', suggesting a lure for game modification downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://catamma.ru/pbw?utm_term=download+dragon+rise+of+berk+mod+apk+terbaru PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404520/normal_605943f886d0f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4485434/normal_60afee105d52d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_6022bf45d9ff5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_6046f50eddb55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482631/normal_605ef8d99e4b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5fe3c90a87985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417817/normal_6045aac9c0c6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_60413141ad9a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_60150eb973bb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_601b331950343.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454670/normal_5ff174e89b7ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481291/normal_6065d184940cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495246/normal_6056021d43dd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_60bed79f2e69b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://jutopar.pbworks.com/f/overhead_carry_on_bag_size_delta.pdfIn PDF document text
    • http://joxakuruvi.pbworks.com/f/total_conquest_mod_apk_hack_download.pdfIn PDF document text
    • http://xugilip.pbworks.com/f/how_to_convert_direct_speech_into_indirect.pdfIn PDF document text
    • http://jivevisubido.pbworks.com/f/conners_3_scoring_manual.pdfIn PDF document text
    • http://dipoziw.pbworks.com/w/file/fetch/144452760/sinitufawug.pdfIn PDF document text
    • http://lutagunis.pbworks.com/w/file/fetch/144674232/bach_cello_suite_1_sheet_music_violin.pdfIn PDF document text
    • http://dibotoge.pbworks.com/f/5579190841.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/f/mularexibivenedopesa.pdfIn PDF document text
    • http://gexufak.pbworks.com/w/file/fetch/144680910/buramofojorevurerexevaz.pdfIn PDF document text
    • http://siruzosu.pbworks.com/f/41670936964.pdfIn PDF document text
    • http://dokajawema.pbworks.com/f/pokemon_fire_red_cheat_list_download_gba.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C4 5656 bytes
SHA-256: 98c4a72d6a64d86291904ceef75916973c7dfe28d8f81f42af1e15ae26722e18
font_01_sfnt_off0000f6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F7 10036 bytes
SHA-256: e1dfcbf7260bbb81e85faf6cc8cefb89cc858a84fad50dfae1ffe1f8fef08b6e
font_02_sfnt_off000112c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C8 11380 bytes
SHA-256: 65805c61f7f22e9c913768f2898399a74c3817ddf6f75a8243bd284f8369baf2