Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fccfadd1e4bb85…

MALICIOUS

PDF

93.6 KB Created: 2021-03-29 00:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ae352f2be4a62c6d7dbf262cda60e31 SHA-1: b30b5aa5bec34420cb128787961bf45e380ce355 SHA-256: 48fccfadd1e4bb855dd04dc0fc0a08905bfbf5324375abcb85737a43cff787f1
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware download site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users by masquerading as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/strik?utm_term=common+law+vs+maritime+admiralty+law
    • http://tiwimifozukimu.medianewsonline.com/beckett_baseball_2020.pdf
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/diwejerub_berixuw_sagumu.pdf
    • http://promooffer.site/is_a_4_quart_crock_pot_big_enough6hk28.pdf
    • https://xoselupovogim.weebly.com/uploads/1/3/4/6/134610719/gekimidi-fasamiza.pdf
    • http://bamupiwabibajew.mywebcommunity.org/prentice_hall_biology_textbook_download_free.pdf
    • https://janolonixo.weebly.com/uploads/1/3/3/9/133987325/646dc.pdf
    • http://fragcups.com/volibagaduruwasuwekorivjxtf5.pdf
    • http://bomepufibawil.scienceontheweb.net/best_lego_building_book_for_5_year_old.pdf
    • https://vifiboreb.weebly.com/uploads/1/3/5/3/135349596/rovij.pdf
    • http://zofunubesosena.mypressonline.com/pikupawusugazizole.pdf
    • https://dotawipe.weebly.com/uploads/1/3/5/3/135323210/6427387.pdf
    • https://digigabatafer.weebly.com/uploads/1/3/5/9/135995708/d8e31dddb1e1.pdf
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/e9607fa530ce3.pdf
    • https://wibipujesotut.weebly.com/uploads/1/3/1/3/131398272/nabojipiputik_bobut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kisimujuk/friday_night_football_tv_guide.pdf
    • https://uploads.strikinglycdn.com/files/ad730533-d143-47c0-abb7-b5eac01457bb/najogurijuzasigad.pdf
    • https://s3.amazonaws.com/zidosozawok/caterpillar_forklift_parts_catalog.pdf
    • https://s3.amazonaws.com/xapidajovaji/secret_sheet_music.pdf
    • https://s3.amazonaws.com/gitipelut/nice_guidelines_weight_loss_medication.pdf
    • https://uploads.strikinglycdn.com/files/04e8039d-74a4-4f68-85d5-4d16927e37d7/stores_near_walt_whitman_mall.pdf
    • https://uploads.strikinglycdn.com/files/01190b50-5e71-46c4-868c-2bf401c796c3/example_of_experimental_research_design_in_nursing.pdf
    • http://mobukug.myartsonline.com/que_es_la_anemia_macrocitica.pdf
    • https://s3.amazonaws.com/lolaritemukole/64703993895.pdf
    • https://uploads.strikinglycdn.com/files/8579e304-d813-486a-87fd-3a2550ee21c4/sketching_from_the_imagination_characters_vk.pdf
    • https://uploads.strikinglycdn.com/files/48c17684-ca72-4b64-a497-21dcc09b3910/fogudiguwotenulasavilisul.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_off00013081.bin
6eb7f837cbc3d488597c669153d6f1bb8cfd6690cc701e97db246087df6eb340		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13081 5132 bytes
font_01_sfnt_off000141f2.bin
8069b28645e62ce88bb4f5073c692d3c6596c5ed8f6924b439218fc1633e129e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141F2 11604 bytes

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