Malicious PDF — malware analysis report

Static analysis result for SHA-256 850e56e26f053e75…

MALICIOUS

PDF

74.6 KB Created: 2020-12-23 21:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ed0bfe2f25b52fa966416e9c4c5a5839 SHA-1: d5ac6bd1305293037034244c008e36fdc06d3c81 SHA-256: 850e56e26f053e75f71522a5e7d62ff54cf0acf0e308717843cabd7cad4d9da8
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffset.ru/123?utm_term=honkai+impact+apk+offline PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421788/normal_5fd6007c753b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_5faa014f55873.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sitok/kuxugigirife.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/articles_of_organization_arizona_form.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/happy_home_designer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/performance_appraisal_sample_comments_quality_of_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da5b17fc-a7d2-4778-bc3d-f666e7a60920/vokobijejewin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a50c1a63-2b08-4a2a-a13c-18b8dcdcfcfb/music_for_a_while_purcell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09d1b6c-d7e7-451f-aeab-7c6936d9da4c/64668382489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e224996c-6738-4a48-81e6-d4b2b19dcd1b/bajazijosad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b20be0-a4a3-488d-8b44-04f07372d2ea/77953652516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0293f17b-08f4-44ef-af0f-c3967057bf6d/minecraft_pe_mod_apk_1.7.10.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/37733029798.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/katonen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c63eb7-ef0a-4693-9aa7-c15e8225906c/algebra_2_an_incremental_development_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/warlock_class_mount_guide_legion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE4 4912 bytes
SHA-256: a007a9a26813d297d864335a4642300c526bc2ec0d1bb1fb213bc7b2fcd1c219
font_01_sfnt_off0000de92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE92 11824 bytes
SHA-256: 4339c30bb247e2dc485008206f49e927c5e886059f5452e95486989d78fa9352
font_02_sfnt_off00010748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10748 16392 bytes
SHA-256: 8d9529fca8e49fd747a132c86257b3f003f6793d9f50918e3e02e184cbe99d44

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