Malicious PDF — malware analysis report

Static analysis result for SHA-256 038d8f80c7152f41…

MALICIOUS

PDF

99.1 KB Created: 2021-04-28 17:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 67da34a129f5f594e2b82c52dc2d1210 SHA-1: aafe8665f34ce532badf45b7a119578efa1887ee SHA-256: 038d8f80c7152f41ce5255aca007f216cedc2c3262a272d09391874a563103f9
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a link farm on disposable hosting, pointing towards a phishing or malware distribution scheme. The primary malicious URL identified is https://jumiwimov.ru/strik?utm_term=singer+201k+potted+motor.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://jumiwimov.ru/strik?utm_term=singer+201k+potted+motor PDF link annotation
    • https://cdn.sqhk.co/zipirevofu/hcYiejc/58125437099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_60212970c95d3.pdfIn PDF document text
    • http://xuponigivixi.66ghz.com/7420387388.pdfIn PDF document text
    • https://cdn.sqhk.co/jipodipotaj/miaggNn/dragon_ball_legends_apk_android_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391898/normal_5ffacb509d735.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475999/normal_5fe3371066de7.pdfIn PDF document text
    • https://cdn.sqhk.co/zixemoliz/hahwbia/bosoxotilikola.pdfIn PDF document text
    • http://debodopox.iblogger.org/10999819980.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475866/normal_5fe393db4a9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485568/normal_6016c1546f643.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369328/normal_5fded0e99c46e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386618/normal_5fe1fc6436b0a.pdfIn PDF document text
    • http://kujudunoberij.22web.org/defiant_motion_security_light_troubleshooting.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/86a3af4e-9810-43fe-a962-3ec2ec416743/christmas_writing_activities_for_6th_grade.pdfIn PDF document text
    • http://jufomotapi.epizy.com/sulemutetikegazin.pdfIn PDF document text
    • http://rotigolas.epizy.com/applied_mathematics_1_kumbhojkar.pdfIn PDF document text
    • http://faxunarin.epizy.com/advertising_techniques_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35628262-75a5-419f-8826-875d34fca471/favojenafafikuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8af8b63-adcf-4167-9721-2aae7e265215/crochet_stitches_for_blankets_tutorial.pdfIn PDF document text
    • http://talidarufuji.epizy.com/53175711860.pdfIn PDF document text
    • http://fexewagesulel.epizy.com/autonics_catalogo.pdfIn PDF document text
    • http://poxipepeti.epizy.com/wijaxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a35f39-13b4-4f2a-b64c-f371183d68e2/38120505525.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_off0001208b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208B 5140 bytes
SHA-256: ca886d86118f8e170c9bc5ffcd009dd7505a91a40e17d1690695cce06cde5988
font_01_sfnt_off000131f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F0 11548 bytes
SHA-256: 297f5232d79cf4aacea399c9845f9aa0e71afb4a3d33460643e3e72d37c17b34
font_02_sfnt_off000159a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159A3 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off00016ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ED1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3