Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5d9e55c56437a1…

MALICIOUS

PDF

58.5 KB Created: 2020-12-20 02:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9062e7d45197bacf65e26355ef4bbd11 SHA-1: 56d9c0a12e11b4297550011567ca84c2a422a7c2 SHA-256: 5c5d9e55c56437a1fa3970d598524bc8871ec8541e20ed588f11d6aa38257f01
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded URI are indicative of a common phishing lure.

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://trafficel.ru/123?utm_term=dos+meses+in+english PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473632/normal_5fdcddfe31c4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_5fd66205bfb76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5fa42c4a15174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5fdbd46536cc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f8fe0c79adfe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc51391a8793968642310f4/t/5fd725035488895576c4f8ad/1607935235553/2154285690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a66dc1ab-8ae6-452d-ac45-8b0caf62029c/marvelous_misadventures_of_flapjack_cat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d6dca2-ea10-47a6-a6d1-32e037eacb49/abbreviated_form_ftb_3500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ed347f-0a02-4df2-a176-666ed2992c56/fnh_slp_mk1_tactical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8fef87e-89a1-4cb9-aac7-89b228b3bb46/bajidekufalizirutatenigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2260a39-cfc3-4f51-b0af-2b8d33f63887/xirufivizazokarusamisot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcb77cc464b41678cc2762/t/5fdcdb8d7fb6a144600ed534/1608309645333/64127819395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f14bab-b71a-486a-b22a-66e86efc5ec3/leap_past_tense_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935b31ce-95b7-4210-bf39-112b8e104e6a/mezokozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5c1a2a-af3e-40b9-b033-51fe0085f461/rufutunenunezila.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_off0000acf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF0 4792 bytes
SHA-256: 839b4c08281a88edb6fe9bead14eeeaf987b2b7497831343ea287f4a1387d0b2
font_01_sfnt_off0000bd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1F 9544 bytes
SHA-256: cb7acc3f578cd9cf32e134fc656ee08936e5f3550dcc2e527a15799aae8739ee

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