Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf19623fbed1c1d2…

MALICIOUS

PDF

78.9 KB Created: 2021-06-01 15:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ead57082f30c09fee84ddeb694652649 SHA-1: 97c2bb681bf58996b12e77b4c50ba252939dbc0a SHA-256: bf19623fbed1c1d24a1e10702cd366f10d562fa13ae664e6a6ab356c6435fb64
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to host a phishing page or further malicious content. The document body, though heavily obfuscated, appears to be a lure related to social media trends.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/pbw?utm_term=top+hashtags+right+now+instagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481397/normal_601b8da69ec3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408335/normal_600b7456349f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465538/normal_6009a4280b92b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_6036b36d0496c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_6065fe98c1f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_60196559e5dc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445733/normal_6064ff5dbf8f6.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/66773d93-6c72-4b46-9362-ad52604da36f/how_to_find_inscribed_angles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc3064e-7e02-4ec7-9586-309a8fabde76/mary_warner_marien_photography_a_cultural_history_4th_edition_pearson.pdfIn PDF document text
    • http://fosirodovo.pbworks.com/w/file/fetch/144453486/28504923190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d25b9ef-f764-40da-94fd-b6a3f174ab2e/historia_de_la_geometria_plana_o_euclidiana.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/f/interview_questions_for_financial_analyst_position_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/674efdf6-8cfb-43e5-a37e-fe1d94d8ba9a/mobofavabadezutakibavewod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4799ee3d-89e0-487a-80d2-986a05dfcd25/what_is_group_representation_theory_used_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a94727-75c3-4c8d-816e-e8c8c0a288b3/xesusetizowilarusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604510d1-c89f-4325-9f85-fd8646def29c/the_land_of_stories_the_wishing_spell.pdfIn PDF document text
    • http://tubekikewabi.pbworks.com/f/pedaxab.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 5244 bytes
SHA-256: af7bec956cd2769d87527efc9a28fe5c1c1b8f856e07aa95d0eeb32b38ee790e
font_01_sfnt_off0001085d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085D 10644 bytes
SHA-256: 33389fe180abb6b7a7b92e7c442574a671f6fe351c557a478c521ccbab0d119a

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