Malicious PDF — malware analysis report

Static analysis result for SHA-256 1396702f52f8ce46…

MALICIOUS

PDF

113.9 KB Created: 2020-12-28 12:05:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 250703c75c13e567033334477ef7d969 SHA-1: d729df77dc4b4ac9b807613c81772fc848b17746 SHA-256: 1396702f52f8ce469c014d15548ee1a6713afa149adc8c76cdb3a425043a3cbd
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing lures. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/123?utm_term=3+nephi+13+24 PDF link annotation
    • https://cdn.sqhk.co/rosavuzezig/iShehjV/iowa_80_truck_stop_barber_shop.pdfIn PDF document text
    • https://cdn.sqhk.co/vugujebeku/jhbbDbP/celebrity_personality_quiz_buzzfeed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5f8d4b530565f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5f918cf2b68fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5fc46c1523f5e.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/G0biajc/65525214253.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3311bd84-cda3-419b-a3bf-a86bda0a5ddf/91466665557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051f6cae-d045-40da-b97d-f1b1a6c5ac03/rurefejozib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/518ebabb-0ce4-4cf5-a227-5f599991edf6/risasewagebij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce0a875-810a-439e-bc69-6bbaff4a93ba/web_displays_mod_1.7_10_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197bec05-8960-4a26-af6d-aa27da4cb28a/airplane_explorer_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7ef054-4f60-402d-8668-a7f45e77fc27/survival_rate_of_pancreatic_cancer_stage_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7960e476-31b1-4762-b322-6f71b0c00a8e/kunofonipabanofojokerag.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
font_00_sfnt_off00017656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17656 4328 bytes
SHA-256: 4da462c3bcd86bd444f05eed8b221131794add401aa2ca7118376899903b0c6a
font_01_sfnt_off000184e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184E9 12128 bytes
SHA-256: 39dbd84c61b44d8e4d01d898e6b6c1955910c16401b7acdc2dfaf5a20570d3af
font_02_sfnt_off0001ac3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC3E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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