Malicious PDF — malware analysis report

Static analysis result for SHA-256 e723c46113ae6920…

MALICIOUS

PDF

149.3 KB Created: 2021-04-03 11:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80b505dad867dc6c02d854f07fc28e68 SHA-1: a15aa8ad034fe3145a73ad1d6d1d269ac85c0d2c SHA-256: e723c46113ae69201e9223c4e1f5eb3749680b5ab0632988a2427dc5a9878d1e
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'https://golowaki.ru/wix?keyword=nature+cleric+guide', which is likely used to redirect the user to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=nature+cleric+guide
    • https://cdn.sqhk.co/xoraxuvonaf/hbXifjc/20853666128.pdf
    • https://cdn-cms.f-static.net/uploads/4446489/normal_6038ee46201f0.pdf
    • https://cdn.sqhk.co/zetoreli/jcghZcv/64773297389.pdf
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdf
    • https://cdn.sqhk.co/jotoselu/dSoTmge/63559062795.pdf
    • https://static.s123-cdn-static.com/uploads/4412391/normal_60017189f2cd6.pdf
    • https://cdn.sqhk.co/niwuruba/qdhehbI/crown_poster_template.pdf
    • https://cdn.sqhk.co/moserusoba/jf3hhgz/xusapifuxeju.pdf
    • https://cdn.sqhk.co/leporolino/Wig8jgh/ladixagagil.pdf
    • https://cdn.sqhk.co/pavetikedur/i1vyzut/quotes_wallpaper_for_android_mobile_free.pdf
    • https://cdn.sqhk.co/tibakekavero/fgiaibB/nekuxikufip.pdf
    • https://static.s123-cdn-static.com/uploads/4426942/normal_5fe5c60e5878f.pdf
    • https://cdn.sqhk.co/fifotadog/jhQyiiY/followers_timeline_on_facebook_page.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tenudif.epizy.com/1040036457.pdf
    • http://lojuwuwa.rf.gd/medical_nanotechnology_and_nanomedicine.pdf
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_8b4555b7d9614fc28845134269387faa.pdf?index=true
    • http://zuvugogab.epizy.com/90363743286.pdf
    • http://roboketisi.rf.gd/bepikawujegu.pdf
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_5a43456a191740bca12f9437bd698283.pdf?index=true
    • https://0ed30ddb-3df1-4505-9e4e-3e87fc6d20ea.filesusr.com/ugd/f043c1_cba382fed0fd4357bdbd1918c968dfad.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000205f2.bin
4a11bfb683154419371061fe22296de71003608d5d85581244d7ced40164af43
pdf-font-stream PDF embedded font (sfnt) at offset 0x205F2 4564 bytes
font_01_sfnt_off00021584.bin
d8acea72c6aee65bea6b9bdd74bf33dea7cba8bcedad9b738e46129f4a6e2040
pdf-font-stream PDF embedded font (sfnt) at offset 0x21584 10608 bytes
font_02_sfnt_off000239e1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x239E1 4324 bytes