Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e06c8e03bc8783…

MALICIOUS

PDF

79.5 KB Created: 2021-02-21 06:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cdb97cfd025fa30e9b18ff6945099f54 SHA-1: 0d8b2ca344ad13972e89c79cd28383279824fdae SHA-256: c2e06c8e03bc8783d94579c08edb6f698de80849ceea2edbc64c811c177150c9
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to salary advice. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+raise+your+salary+by+napoleon+hill+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378404/normal_602f6f4ca4ebd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fd099c65a5d0.pdfIn PDF document text
    • http://tugrull.com/govijotopigovozasiglutu.pdfIn PDF document text
    • http://damvglaz1.xyz/70551148427xgtl6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419425/normal_5ff174a37ed37.pdfIn PDF document text
    • http://dvigatel.guru/hattrick_s_sports_bar_grill_hatfield_par7abn.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/famous_return_of_the_jedi_quotes2mutr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470014/normal_602d7112bacc4.pdfIn PDF document text
    • http://naturaitalia.space/bevufarofunilibinexebiviy.pdfIn PDF document text
    • http://zivudib.66ghz.com/amnesty_international_gun_violence_report.pdfIn PDF document text
    • http://sodahq.club/apple_app_store_androidary8i.pdfIn PDF document text
    • http://kernig.store/what_are_the_unidroit_principles_of_international_commercial_contractspm7ye.pdfIn PDF document text
    • http://realnoe-obshenie.online/62169950977a9231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_601950a3cccf7.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/kakekojezutok/fibavigi.pdfIn PDF document text
    • http://lobunuwofapow.rf.gd/33347242153.pdfIn PDF document text
    • http://kirigawegugava.epizy.com/cable_tray_fittings_revit_family.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/regabowozixuguzamupokawu.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/abdul_kalam_books_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/68950516670.pdfIn PDF document text
    • http://wuzuferopo.epizy.com/gst_annual_return_format_in_excel_latest.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_off0000d4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EF 5424 bytes
SHA-256: cd03410ffb9482926414ceed86d76bc6de412a2bec37b546d2fa1edaf07930eb
font_01_sfnt_off0000e75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75C 2284 bytes
SHA-256: 5bae6048ce642e648ec0930c1b23cf937ee072ee10dfd0da5f1396ca5faa57ef
font_02_sfnt_off0000f1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DC 11244 bytes
SHA-256: bc680ecde94c8c0bd43036051895118f170500bb99e21bb311729f5e36358ed8
font_03_sfnt_off00011611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11611 17396 bytes
SHA-256: 76b5b665d2bc80c9320df854733da56604599034a8a0f6f12b62dc58725d10c0