Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc71ec7c13c609d4…

MALICIOUS

PDF

94.1 KB Created: 2021-04-08 06:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: af09ddca840ec199e6671a78eda70139 SHA-1: b029f53feedb0d52f86e5938e11ddab20fdd97bf SHA-256: cc71ec7c13c609d4c940f62179d90c5fcf7a7a079d62ab4c2b5770c80f9c3f95
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a user manual, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/wix?keyword=belkin+omniview+pro+3+user+manual PDF link annotation
    • http://healthit.space/vonapakoccw47.pdfIn PDF document text
    • http://migipobazu.mypressonline.com/encyclopedia_of_animal_rights_and_animal_welfare.pdfIn PDF document text
    • http://hellochildren.online/33561109571xkv2b.pdfIn PDF document text
    • http://molotkov.site/requirements_for_a_general_contractors_license_in_utah6ccl9.pdfIn PDF document text
    • http://omynutural.space/razudipoxitomedalurova9atz.pdfIn PDF document text
    • http://italiahot.space/45901335781ypq67.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/kandungan_gizi_belimbing_wuluh.pdfIn PDF document text
    • http://eeuuurrrrr.space/sadunuzalkmo98.pdfIn PDF document text
    • http://khanapoorti.com/1414944545btxdr.pdfIn PDF document text
    • http://goproonly.com/tiveresujomophpb3.pdfIn PDF document text
    • http://javefuxola.getenjoyment.net/96767621008.pdfIn PDF document text
    • http://mamajan.space/20890574314aoelv.pdfIn PDF document text
    • http://mx50off.pro/graco_snugride_click_connect_35_lx_manualmjx5n.pdfIn PDF document text
    • http://stebsmeh.space/c_oops_interview_questions_for_3_years_experienceewoqd.pdfIn PDF document text
    • http://xezixaz.getenjoyment.net/642044017.pdfIn PDF document text
    • http://puwufonizezez.22web.org/xegujogirunaxugejure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ecfa400-5184-46af-8872-5ad916b4abd2/56342315171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c1debb-9b58-4571-9ecc-7a76315c6178/73934027072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12083793-c2ab-4ba0-9931-b9c57eb18e51/dewalt_pressure_washer_hose_3400_psi.pdfIn PDF document text
    • http://fijetetesozaw.epizy.com/hbs_test_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24912f6b-3d87-42cb-b510-7256836e7f99/oracle_database_11g_introduction_to_sql.pdfIn PDF document text
    • http://jepisaf.epizy.com/gexexufosizaripori.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 5396 bytes
SHA-256: 169f06cd32dba0521e3ab987bbe07866810be859f8f1fa407db5efaa8108b2d0
font_01_sfnt_off00011c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9F 2096 bytes
SHA-256: 59f087bfbd4381559b6eef4bdc1999008748869f3870596d459271ce581273e4
font_02_sfnt_off0001265d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265D 11464 bytes
SHA-256: 5959bc4cf1d914eaac323a4227a1d2af7ac245247ad7396b9a69e6637817bb7d
font_03_sfnt_off00014daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAA 18956 bytes
SHA-256: beb4ab181d1a1fff1bac46a61accfcfe6be1590540bcbad3ed901101a63c770e