Malicious PDF — malware analysis report

Static analysis result for SHA-256 689ffb8f92899388…

MALICIOUS

PDF

90.5 KB Created: 2021-05-17 23:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a929ef1b8e18ca08903cc749f7828946 SHA-1: 92b7e24d5e0b8ddc99b5b96b06d6ac6fcb3181a2 SHA-256: 689ffb8f928993885383f81889c7a3d0b99394b335343db076b4e368d2e43c97
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware delivery. The document body, though heavily obfuscated, appears to contain metadata related to network adapters, suggesting a pretext for the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dugedepap.ru/strik?utm_term=broadcom+802.11+abgn+wireless+sdio+adapter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367961/normal_5fe5b49f58414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456687/normal_600f4cb71ea25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422382/normal_6008ff34a88fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_6056f055208bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae3fd44-2113-48cb-bdcf-36244037513e/frayer_model_examples_math_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/22179983754.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/45425604829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10867560-a4d0-4261-99b3-fb92885255ee/why_does_my_cable_box_say_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f4a878f-bda9-4221-8ab0-402993100af8/o_aval_de_um_ttulo_de_crdito_ser_sempre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2909f4c-6d76-445a-978f-d618845ca6e5/organic_chemistry_brown_solutions_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80e5b415-e71a-4f8c-9213-35aa059050a5/what_is_the_best_bible_version_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0adb1bf4-7702-44e3-b09f-1cd4e6063620/what_do_the_crown_of_thorns_starfish_eat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/413c7a7b-083c-4593-b8f5-e66e3e24dce7/70280373430.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/mary_shelleys_frankenstein_1994_full_movie_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/origin_of_the_phrase_tipping_point.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a400eae-2801-48af-ada8-e2fbb0dd7d91/vobemeribuwikoriviwuvad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d4573dc-4090-4218-8890-a20f75a00b65/kitchenaid_superba_oven_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/412eaf5b-d018-4dcb-88de-fca7bcbea88d/critical_race_theory_sbc_presidents.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c21386a-699c-44ab-8e40-5eb5ad97f048/beautiful_creatures_book_synopsis.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/i_found_a_way_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/changing_transmission_drive_belt_cub_cadet_lt1046.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15A 4596 bytes
SHA-256: 2d23959559547ffb7e486df80769bbd081114d942e271ade8ff9b8c69b99f5bc
font_01_sfnt_off0000f1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B7 6228 bytes
SHA-256: d66066426ac9c43be63855ca423e2b2cf97c9f13794f69b863e521be580a0269
font_02_sfnt_off000106d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D8 6148 bytes
SHA-256: 4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157
font_03_sfnt_off000116b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B9 14824 bytes
SHA-256: 323c13f7e4a11294d13fc07b222d949f555ff022f20fd71a242ae8b7c7e3b98f
font_04_sfnt_off0001429c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1429C 16684 bytes
SHA-256: 4cd55fee6c52bbab32ed20b0b25846bff407090075fa0ab45dc9808449a8eeb0