Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8658bf3c44a521…

MALICIOUS

PDF

66.6 KB Created: 2021-05-28 12:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 24dab3cba3ccdd890999a8956e652666 SHA-1: 2035ee9d55d57b9a1947ecb62604cdceb321609f SHA-256: df8658bf3c44a5219a20eb101ba36c10721e0930f347b028d5b03e139063035d
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. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to internet content, which is a common tactic for phishing or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/123?utm_term=reacting+to+funny+kid+test+answers+dangmattsmith PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425768/normal_601bb3eb37a0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372087/normal_6004d4d27b1c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376105/normal_5fceff132011d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451737/normal_6023c949cd3e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_605b84b097122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_605b6f5a8b0b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_60007770ca745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5fd86cbb0f284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_6035768656ec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_6052ff484829a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501495/normal_5fc78b20e3150.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378621/normal_5ff24059dad47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450514/normal_5feedc3332ca3.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/9cce08d7-0b71-49de-91cc-f971d337bb5e/85274102312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82b3c8d-41a5-4d61-ab95-13b79811c241/tutegusupiwejuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a2502f-250a-481c-9404-c667d27a4cf9/iomega_storcenter_ix2-ng_default_ip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd77a61a-9446-49e4-bde9-a26c9c2e2013/heart_touching_sad_love_story_in_bangla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9128168-77e5-426e-a11d-e77ebba79cad/kiduxegutudakumokedanim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a72bd30-20af-4a51-9fe7-3e916f80790b/fishman_aura_spectrum_di_preamp_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af144e77-fa42-48e9-986f-70641b6eaf32/filibertos_arizona_burrito_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd34643-aaca-4d0a-a6ca-c1be71c47089/best_roulette_strategy_2020_reddit.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_off0000c8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A7 5668 bytes
SHA-256: a7f2739e6fdfdfa8e77493c3c009a9c7b5512904398e9cbfc3b64195a9f7ce36
font_01_sfnt_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 9684 bytes
SHA-256: 2e722169c9752d1faf6017b3d9ca066623a8964aaf50ec1805bd7d8b0509c9f6

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