Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1233b826451428e…

MALICIOUS

PDF

96.2 KB Created: 2021-03-10 19:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d76d455ec2970b8d37e8c5b0d59e3242 SHA-1: a3d1d76c104c3915e6c4fdf8995e0be09cffbb72 SHA-256: f1233b826451428e9be5779f78dd7f7beb9dda24ce1f4690b190f702b490841f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a secondary payload or lead the user to a phishing site. The document body, though partially corrupted, references "Ccleaner android ek", suggesting a lure for downloading potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/123?utm_term=ccleaner+android+ek%25C5%259Fi PDF link annotation
    • http://liginuj.22web.org/types_of_curriculum_vitae_template.pdfIn PDF document text
    • http://businesslinecenter.com/siemens_plc_price_listt9xq7.pdfIn PDF document text
    • http://excellent-spb.ru/fuwumodimelixopenoregbbul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_60486f97b2cb9.pdfIn PDF document text
    • http://kurs1.xyz/how_much_is_a_wii_u_at_walmartbp98w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407664/normal_6011c2ac7d489.pdfIn PDF document text
    • http://expressvpn.store/minecraft_apk_1.8_0.8_indir39d7t.pdfIn PDF document text
    • http://gatorama.fun/batoduwaxijitopaxekmudc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458623/normal_5feb61e939380.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/37422ee7-37ca-47ac-aaf5-eee030956220/nukobuwuwuzumix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f55a535-c7d3-44a0-aade-b493fd3de68d/borujoxufisemufanavepiw.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/what_does_the_acronym_smart_stand_for_in_smart_goals_g_certification.pdfIn PDF document text
    • http://nakulugexogi.rf.gd/engineering_guide_wow_bfa.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/accp_guidelines_small_cell_lung_cancer.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/92715205816.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/free_sugar_skull_pumpkin_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/spring_jnditemplate_lookup_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef927955-eae2-48c9-b414-6a808e8bd545/juvodinejadogila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de2886f5-32b2-4d0c-b940-ace81fc4b16b/83421572231.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/vonajemibesutu.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/ganesh_bhagwan_ki_aarti.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8A 4800 bytes
SHA-256: de369f5b6794adbb2333baafda6525d7f425b126f79c79303d93158a8dbdf658
font_01_sfnt_off00013bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCB 11712 bytes
SHA-256: 19764278c1f2177d056a580a8922df03764c47f39488f9845e5436b7135956b5
font_02_sfnt_off000163ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163ED 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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