Malicious PDF — malware analysis report

Static analysis result for SHA-256 de956382f73b6949…

MALICIOUS

PDF

83.0 KB Created: 2021-04-06 01:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85150064f7970a99f91293b220f4c63f SHA-1: 6ec2ff03274ab854df2b912602a1ff42ccff03be SHA-256: de956382f73b69492c74486ff802407cbedf302cf8aaa020b0688db98f35eb4b
136 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a fake award or download page, masquerading as a PDF editor. This heuristic, combined with ClamAV detection and ML classification, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a malicious intent to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/award?keyword=apowersoft+online+pdf+editor+download
    • https://static.s123-cdn-static.com/uploads/4454678/normal_5fc62d83e2636.pdf
    • http://reduslimitalia-official.site/291946655091ccoi.pdf
    • https://cdn-cms.f-static.net/uploads/4454164/normal_600ffe047d6c6.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • http://zoosalon.org/14997538052j8p0o.pdf
    • https://static.s123-cdn-static.com/uploads/4377679/normal_5febf74eda347.pdf
    • http://jufawet.iblogger.org/xinafuwikakabijiga.pdf
    • https://cdn-cms.f-static.net/uploads/4372072/normal_6063c7d3bcb2b.pdf
    • http://copyrightsupporteds.com/how_to_connect_sharper_image_wireless_headphones_to_tvm8t7d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/178c1bdf-9af4-410c-8b87-402a54d7c97c/pidaboxodisa.pdf
    • https://uploads.strikinglycdn.com/files/4cbd9018-630d-4c59-b775-4d0cb0f7e6b0/tukatesobag.pdf
    • https://uploads.strikinglycdn.com/files/2ff8d3a2-7209-4705-a060-cda0002c018d/meditation_coloring_pages_for_adults.pdf
    • http://vadawowugozopul.epizy.com/xlsx_for_microsoft_word.pdf
    • http://tivanebizogosa.rf.gd/quran_recitation_app_free.pdf
    • https://uploads.strikinglycdn.com/files/ff3d2d38-9fc0-4900-bc4b-8c9dce5afae5/soundcraft_ui16_firmware_update_instructions.pdf
    • https://uploads.strikinglycdn.com/files/d2281007-eb18-488d-bef5-1b861ae73eb8/diablosport_intune_i3_tuner_14-16_5.3l_silverado_1500.pdf
    • https://uploads.strikinglycdn.com/files/6ee1352c-f7c8-4a77-9dfe-a0347cec7852/food_calorie_chart_for_weight_loss.pdf
    • https://uploads.strikinglycdn.com/files/03c53e1f-64af-4def-b905-45dca76b4aa0/39964379665.pdf
    • https://uploads.strikinglycdn.com/files/e62a6e8c-af44-43a0-b400-0c14d8920d77/45196082211.pdf
    • https://uploads.strikinglycdn.com/files/bc334ffe-4375-4a41-9caf-3b3116575700/rowenta_garment_steamer_walmart.pdf
    • http://zazudokak.rf.gd/tunepexesozoledexisef.pdf
    • https://uploads.strikinglycdn.com/files/19073536-86d1-4f99-b37a-054d4adee7e5/dungeons__dragons_spellbook_cards_volos_guide_to_monsters.pdf
    • http://nabikelotedabe.epizy.com/73074572991.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_off00010764.bin
7baf314afe058eabe3f767b64d4eba409dc206b7763cee5746dbdb0884d8eede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10764 5116 bytes
font_01_sfnt_off000118e8.bin
e9eda652fcf078fc401979e41f8b3eeaaa90b7f331b0d3dda101cb7b4cdd6f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118E8 11008 bytes

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