Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b9c7ea7908f147…

MALICIOUS

PDF

519.3 KB Created: 2021-01-26 00:26:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 576bdf3fae6b24b9983713b5c59d22d8 SHA-1: 1bf9536fd11834e3a654bdf4b3f935844356acea SHA-256: a8b9c7ea7908f14722dfdd6272bb2dc71dff0020f7da91021981bd4d66ce1b45
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 flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to lead the user to a malicious site. No scripts were extracted, but the presence of the external URI suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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://crophysi.ru/123?utm_term=what+is+example+of+analects PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447093/normal_5fef8667c7407.pdfIn PDF document text
    • http://boost-store.net/pathogen_examples_in_animals65pyx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421464/normal_5ffd1fbe669a1.pdfIn PDF document text
    • http://arm-watch1.club/my_toilet_runs_every_ten_minuteslgo4y.pdfIn PDF document text
    • http://ijmalan.xyz/gituguf4ee11.pdfIn PDF document text
    • http://frukt.space/xonobofelubepafeturakgf5pj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461205/normal_5fee0e4119727.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373243/normal_5fde2d645db2e.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/wolina/another_word_for_sharing_personal_information.pdfIn PDF document text
    • http://bevevekafoli.epizy.com/jaditilax.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/adjective_order_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/cavernous_cerebral_vascular_malformations.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/93651765475.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/71088353670.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/adi_lakshmi_purana_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/estomatitis_aftosa_tratamiento.pdfIn PDF document text
    • http://jovurafop.epizy.com/fejobawaforu.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/calefont_albin_trotter_mertig_manual.pdfIn PDF document text
    • http://fapomotomojopog.epizy.com/stages_of_meiosis_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00042edb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42EDB 323568 bytes
SHA-256: 339a4cce9b7e00c6d9d2a4a12b73494fc85cff70138ea5bfb5b3e9bc539fa457
font_01_sfnt_off0007d088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D088 5240 bytes
SHA-256: 9450017c53c855effb60b4dc7dfbc62e836834b7c4ac0af7f49015f5b990f9b5
font_02_sfnt_off0007e24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E24F 14112 bytes
SHA-256: 2589cd347b05617e75fa7270d1cf046e1e6fdaef3755a66f7d3c3897dc1d9222

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