Malicious PDF — malware analysis report

Static analysis result for SHA-256 88154cb7d84e94e0…

MALICIOUS

PDF

83.5 KB Created: 2021-10-11 19:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7638bebb5694267e87ecb72528c14670 SHA-1: 12f7f4185c913501c4001dba41de70f8f99d1d7c SHA-256: 88154cb7d84e94e075857d61123b3c7586b7f3c4e7cd41b550f28f6132bab314
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=name+tag+minecraft+how+to+make PDF link annotation
    • http://lasermedia.cn/userfiles/file/nukelo.pdfIn PDF document text
    • https://arerp.kr/data/file///78422707183.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/2aed9f8710663e47c1c4ad44b6eb1311/70252965280.pdfIn PDF document text
    • http://lemma-studio.pl/userfiles/file/22244436038.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/kofuxerif.pdfIn PDF document text
    • http://tw-jia.com/uploads/files/202109060329291615.pdfIn PDF document text
    • https://mama-light.org/business_school/uploads/file/38599237128.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/ninuwibilodimojitavovuza.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name/files/muzajagabitulu.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/12458524433.pdfIn PDF document text
    • http://sns.hu/_user/file/37347381559.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/92412410619.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/parevuzoxavafejezavuti.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/vifedozenew.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/58249277855.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/64776579535.pdfIn PDF document text
    • http://jinyudachem.com/upload/files/pakasenemobufemif.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/forusanasitorenidafawi.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/18526549103.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/55135945633.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/negorapavigod.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/76663019122.pdfIn PDF document text
    • https://badrivishal.com/media/befavab.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://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_off0000da35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 20672 bytes
SHA-256: 94e3c2e40c86ad8964606cb779aa93d23c43bfb446261b175b12c2b231c970ec
font_01_sfnt_off0001103a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103A 10724 bytes
SHA-256: eaf465cace35d2c5dbbe881bc11a7cdc5b9c122ea22b647396a89998a7aef01c
font_02_sfnt_off000128bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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