Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a0e95dd181d0c6…

MALICIOUS

PDF

80.5 KB Created: 2021-06-11 00:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4288cf4925af2626d2be81ec70c64d97 SHA-1: 30d165af7d4ff40909a737408b92668794788069 SHA-256: 12a0e95dd181d0c65f391e3a8549e33c85ffeeca5b194b3f75bd1411318a6825
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that impersonates official instructions, likely to trick the user into clicking it. No scripts were extracted, but the PDF structure and heuristics indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://wastran.ru/pbw?utm_term=navy+medical+evaluation+board+instruction PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486987/normal_6028e1b3b0e4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469849/normal_605d7a91c51fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467601/normal_602e21fa9bf6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415543/normal_5feaf2952b067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463554/normal_5fe0d6dd9b4ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d01d407a-a320-40d2-bfb3-32c60f4097b2/mofewugedesewimifevapok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/693a49ff-45c1-49e1-a08e-6c653e36a23d/the_candlestick_course_bahasa_indonesia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3fed3a-1fe1-4783-8118-903430b59422/daily_personal_inventory_10th_step_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13bdc68-0ff4-4c29-8f05-522468078a82/netesimunanegawutobol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3477df5-b8ec-4bca-9b7d-082d4befe16b/what_exercises_are_not_good_for_diastasis_recti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d926905a-0b62-42d2-8b7f-cfcd6312a166/73328400024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b61aad-87b5-4823-9174-a65ac7c4a1ec/kepurokukiborezamivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8b3261-a9bb-44b0-a87c-70cea3526387/king_of_fighters_97_apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b101adf-da1d-42cd-a58a-91c32fa5287b/maximum_shear_stress_theory_also_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc1a809-b433-4d9f-b1e6-d66ad497b065/safety_1st_thermometer_change_to_celsius.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a35c01f1-7aa8-4757-84b8-5a5e7d063545/24897328437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18b0d3b9-127d-4faf-952d-102829aa5384/8gb_digital_voice_recorder_manual.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/f/classification_of_words_in_english_language.pdfIn PDF document text
    • http://giresizuloki.pbworks.com/f/63165135795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c48483-5272-4e92-8143-dafdf7d87122/53771661227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/422c6eef-ca2d-4ca5-80c0-01cb064368d4/13213107498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ceb870d-a690-48f2-a90d-6c662b9fbcc2/19185815747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee061f5-ba12-41bd-a092-cbb83f8a22f2/america_the_story_of_us_worksheet_answers_episode_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b2a0e09-1d46-470f-be27-8360fd6ca401/xijutumerixenabomoraren.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/f/mac_os_usb_boot_creator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/483d7ec3-eb82-4a70-a9e7-79b0f6d00f7b/what_is_a_myocardial_perfusion_scan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 5236 bytes
SHA-256: 15979596277dedbc3b40b241c55072ce39be1932761beda47f64d87da11b087e
font_01_sfnt_off000100f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F8 10820 bytes
SHA-256: 400fce61e504b3d9ba2c969adedd2bd3d75f026af91790913b4102d15e0632fa
font_02_sfnt_off000125cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c