Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9aa8116b03284c…

MALICIOUS

PDF

95.8 KB Created: 2021-03-20 23:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34922eae1313d7f324c9596b8ff55cbd SHA-1: 6035a31a1a173fdd2b76ffb726fac13c07a56d13 SHA-256: 1f9aa8116b03284cb4ed65100879aeeb58a2311e1d4cab04062253686472a323
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely intended to facilitate the download of a malicious payload, such as the 'cartoon hd extra apk 2020' mentioned in the document body. The presence of a visual download button further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/wix?keyword=cartoon+hd+extra+apk+2020
    • http://sitajejo.22web.org/iso_calibration_standards.pdf
    • http://juzibekemuvur.iblogger.org/bhaiya_song_tamil.pdf
    • https://cdn.sqhk.co/sozaxejiv/WOOBqdE/77268856245.pdf
    • https://cdn.sqhk.co/jitolado/gjtEiel/32871403082.pdf
    • https://cdn.sqhk.co/puvubuzu/ibjyfhj/country_friends_veterinary_clinic_royse_city_texas.pdf
    • https://cdn.sqhk.co/gixelotopa/eNR594Q/shooting_showdown_hile_apk.pdf
    • https://cdn.sqhk.co/poxirowo/jhemiaF/m12_profibus_pinout.pdf
    • http://123dutch.com/10688536879x2lxi.pdf
    • http://study-english-05.site/o_cantico_dos_canticossutq6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4e35f2dd-2907-4de8-9d8b-c6c34edbeea5/2004_yamaha_yz250_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/5d30ebec-522e-429e-8c10-bef9a3d62f5f/pefaditolejanulukajixomek.pdf
    • https://uploads.strikinglycdn.com/files/37b978bd-5309-471e-a159-cb41f785a92a/jazasadavedemumapo.pdf
    • https://uploads.strikinglycdn.com/files/be9c9ed4-26c6-4145-b5f1-44d98d284e5b/how_to_watch_call_me_by_your_name_on_netflix_vpn.pdf
    • https://uploads.strikinglycdn.com/files/d80127fa-3259-447b-87e2-75e1a9356ec5/14194174495.pdf
    • https://uploads.strikinglycdn.com/files/a07b0c9c-4aea-45b8-b037-1f67ca434c71/polk_magnifi_max_sr.pdf
    • https://uploads.strikinglycdn.com/files/815e2463-6e20-4b5a-8522-07f17e83fff9/is_zotero_compatible_with_endnote.pdf
    • https://uploads.strikinglycdn.com/files/2dc3946d-c86b-42d9-a5ad-67fb0803932b/derubixiremuluserizetiwal.pdf
    • https://uploads.strikinglycdn.com/files/92e02b4c-c4cb-4a38-90c5-209125524fd2/fegubotedumu.pdf
    • https://uploads.strikinglycdn.com/files/cab2297c-2d55-41c5-be53-01c98f78c16e/what_caliber_is_a_mini-14.pdf
    • https://uploads.strikinglycdn.com/files/3d8f6fd9-95b3-4910-91e8-1f74fa05ced9/what_does_an_it_operations_manager_do.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138b7.bin
39f10e7ca1757af7442e7e32a22a433e248840532ebbfb3c544c277e311c0d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138B7 5148 bytes
font_01_sfnt_off00014a33.bin
e3169b437d7f53f70c4064deaaf7106bfe6e493c27fce63f57d19d4340b2ba9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A33 11316 bytes

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