Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e528bad0fe97ac…

MALICIOUS

PDF

80.7 KB Created: 2021-03-08 18:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 830455865e0d356173648d668e9d4be3 SHA-1: 17415a89a15fdd2d95b043b95aded0fd326bc6a6 SHA-256: 27e528bad0fe97ac4230849950042fa0a76150b9ee6da75e730f22c1d4ed789e
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Ielts writing task 2 sample answer pdf', suggesting a lure to a malicious site. The presence of external URIs indicates an attempt to redirect the user to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/award?keyword=ielts+writing+task+2+sample+answer+band+7+pdf PDF link annotation
    • https://cdn.sqhk.co/bugininaxi/Hhchbjh/lovamukesagamexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_60464fa021490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_6039289996f31.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/gehjjbQ/kid_city_fortnite_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/oBigifv/oklahoma_natural_gas_phone_number_tulsa.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/hdiajbB/tivilovude.pdfIn PDF document text
    • https://cdn.sqhk.co/tixelila/kmwgflt/83190249758.pdfIn PDF document text
    • https://cdn.sqhk.co/safimowexaw/jh26k8q/apus_launcher_latest_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/cgdQjbN/kasozarixe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fff3f56a97fb.pdfIn PDF document text
    • https://cdn.sqhk.co/numorolele/KegghcG/bawoma.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/hijhdji/spinal_tap_castellano_mega.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/RUjfjjd/star_realms_board_game_rules.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/0ed8293b-2e0a-448b-a3d3-4833e4411eff/ge_spacemaker_xl_over_the_range_microwave_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90a8465-454e-4235-a007-ef04d11b2754/95864377373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5566ff9-0e6d-49e8-b815-15485813d3d8/jotok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5bea8aa-8ed3-40e1-bdc8-ef99a3d18d5b/43093061123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8e360f-29ab-4b18-90d2-731d23b26657/1213075889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11aafefc-f058-4ba5-80c5-9886efdeb471/bijafaxapifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9bb4127-f362-4822-b1ac-28f339a1a153/what_is_the_difference_between_roku_streaming_stick_and_player.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_off0000f7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 5808 bytes
SHA-256: 7806eb5fea077e1fab2c6d9d61661eda297ce51040449673cacd4366f3c4839d
font_01_sfnt_off00010bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB9 15064 bytes
SHA-256: e2e68e04c7d6622e9dc8f6ccce3a3d7e79475d18cbc3b11c7e707e8a8d15a9a4

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