Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f51ce66a57cd6d…

MALICIOUS

PDF

80.9 KB Created: 2020-12-28 12:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9ff2c3c5633f2ee955a51af1da944e00 SHA-1: 18f4caa1445155557c05aee392567bb8ba930ace SHA-256: 89f51ce66a57cd6dadf9223b288d12fc8025ce8d0f97cd749e7be1bcaa3c014a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an 'apk' file, reinforcing the phishing or malware delivery intent.

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://trafffe.ru/123?utm_term=sd+maid+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449395/normal_5fddb2a0362fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5fb338af97da1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421058/normal_5fd082564f691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f8d4a7ce5443.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414864/normal_5fcad70290666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469638/normal_5fa65a9c4d44e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_5f93d534ac42b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403533/normal_5fd078fdc8e45.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/julaxel/wewupimaviwukameferomefil.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/vhs_opening_home_alone_1_199900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/163d0805-f873-42a2-b622-14b5652167a7/lefoli.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/paparazzi_gift_certificate_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/atlanta_hawks_2017-18_record.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD24 4964 bytes
SHA-256: 07e644fd69144494666fb1f29c962756e8de460b448ba958136129714a05a151
font_01_sfnt_off0000edf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF1 2344 bytes
SHA-256: ad743721c4daa4cd7304924525628814ab0b5ec059ad50ab3aa19904effeb621
font_02_sfnt_off0000f85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85D 12400 bytes
SHA-256: 6f6786ca7b978107287e0f543b5431f138de3303312a6b97eb9b911538a325ca
font_03_sfnt_off000120ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AD 16344 bytes
SHA-256: f3b95f1269985bafc3dfb9b5b35e76df8a4d57039a143c013aed99c7cf3a4a89

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