Malicious PDF — malware analysis report

Static analysis result for SHA-256 d81790e9d0d4826c…

MALICIOUS

PDF

81.9 KB Created: 2021-03-15 03:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b2888dddea2cc2c47060a9023f0800f SHA-1: d9fde261cc4a208e6584b4da2bdde3dffb1f5f36 SHA-256: d81790e9d0d4826ce972a9dc67409298051414b255f0b182844fc6bfaf1d11d5
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely serving as a lure for phishing or malware distribution. The document body, though heavily obfuscated, suggests a topic intended to mask the malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=christian+baseball+players+quotes
    • http://fanisore.sportsontheweb.net/85082711258.pdf
    • https://cdn.sqhk.co/silakozafi/jOjfgdS/27639867628.pdf
    • http://luwogexejel.getenjoyment.net/how_to_fix_cpu_water_cooler_leaking.pdf
    • https://cdn.sqhk.co/mudinaxape/jbgeSgv/13734825933.pdf
    • https://cdn.sqhk.co/soziwariru/ge2AAih/65171450633.pdf
    • https://cdn.sqhk.co/jowepotoxum/yhajfjc/bovatinodewokolazarozubij.pdf
    • https://cdn.sqhk.co/nimuxugemu/YHVIQha/lukewibuxege.pdf
    • https://cdn.sqhk.co/zadorari/hdWyaic/92798874377.pdf
    • http://xexapitanegis.getenjoyment.net/how_to_calibrate_casio_watch_compass.pdf
    • https://cdn.sqhk.co/vavapezami/miggghc/7_little_words_answer_key.pdf
    • https://cdn.sqhk.co/vozaxodep/PyiggfO/79348102752.pdf
    • https://cdn.sqhk.co/tovipovo/hal26N6/yellow_floral_wallpaper_uk.pdf
    • http://lamakexo.scienceontheweb.net/72501394552.pdf
    • https://cdn.sqhk.co/kokojisip/wjaTqjj/galejumasafobabe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/df1f15a6-225d-4308-b185-c4e7e196c897/zenopejizukefedu.pdf
    • https://uploads.strikinglycdn.com/files/36deadd9-26fc-4a29-ac9d-66bf224c6d7f/jakixifomet.pdf
    • https://uploads.strikinglycdn.com/files/59033976-b9e8-432f-8556-e891ba21fbbf/kifibevepenemuboxotelil.pdf
    • https://s3.amazonaws.com/tumuzu/destiny_2_steam_transfer_re.pdf
    • https://s3.amazonaws.com/lowuwofuxali/dofus_huppermage_guide_pvm.pdf
    • https://uploads.strikinglycdn.com/files/ec8cde33-46fe-419b-8442-e31dc4b623b4/xagimurubegoxelatudok.pdf
    • https://uploads.strikinglycdn.com/files/2067c6da-1e15-4cfa-a555-5efa01152e58/how_much_oil_in_toro_6.75_lawn_mower.pdf
    • https://uploads.strikinglycdn.com/files/36dda697-684d-44e9-9197-e5d929e30564/dexuwelimupokejorazaxov.pdf
    • https://uploads.strikinglycdn.com/files/7168ffde-a3b7-4784-b787-8d2a9176eb98/plantronics_voyager_edge_windows_7_driver.pdf
    • https://uploads.strikinglycdn.com/files/fd046d38-c0bb-45da-a46d-7254e1dc99d3/how_to_write_a_basic_script_in_windows.pdf
    • http://vakogez.myartsonline.com/schlage_fe595_operation_manual.pdf
    • https://uploads.strikinglycdn.com/files/656ce072-3f10-4c02-b0e8-258bebea792d/sirepufirimugogenobu.pdf
    • https://s3.amazonaws.com/gaxuremewuger/christmas_carol_songs_mix.pdf
    • https://uploads.strikinglycdn.com/files/4d906db7-6c09-4f10-baf1-9532c9458a02/logitech_k330_keyboard_receiver.pdf
    • https://s3.amazonaws.com/sigobija/zipodedirire.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_off000102c7.bin
9abac7a7d17519396121787673de1ea7d7ba4c0cb65afb0722dee97920ab7815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 5180 bytes
font_01_sfnt_off0001145c.bin
eab5e66bbced0dcf1757261bceca482ae73869f200c5a2db21bf3d6db320690b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1145C 11208 bytes

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