Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d6e996e7658eb0b…

MALICIOUS

PDF

73.9 KB Created: 2021-03-14 01:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30adef392794950486053c7325c9974f SHA-1: b6be4af3f23cdac577fdae5294711140072d84ae SHA-256: 1d6e996e7658eb0b64d5ecbaa0991e9be4ec926c42c9b9d88ed680a75abcea17
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL, 'https://botokaw.ru/award?keyword=free+pdf+to+word+software+converter+full+version', is presented as a way to obtain free software, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/award?keyword=free+pdf+to+word+software+converter+full+version
    • https://cdn-cms.f-static.net/uploads/4447663/normal_5fd67d1d5483f.pdf
    • http://sq11mini.com/how_to_find_the_missing_angle_measure_of_a_polygon1d90v.pdf
    • http://onsideball.info/bupelakizivowusaxowesama2ezke.pdf
    • https://static.s123-cdn-static.com/uploads/4492892/normal_60029bbaba753.pdf
    • http://ipoteka.net/53084520016k4fj9.pdf
    • https://static.s123-cdn-static.com/uploads/4449424/normal_5ff3d271b1837.pdf
    • http://bonusiotsbera.online/pathfinder_2e_character_sheet_auto_calculatingvhwou.pdf
    • https://static.s123-cdn-static.com/uploads/4382962/normal_5ffaa1a235dc6.pdf
    • http://gatorama.site/be_smart_english_workshopzy89y.pdf
    • http://wisecredit.info/wahl_clipper_corp_sterling_il_usa_model_8081kww07.pdf
    • http://moscowflowers.online/hunters_hunted_achievement00q2g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lelikerakovet.atwebpages.com/anatomy_of_human_stomach.pdf
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_784315213ff64bd69d2096524967d92d.pdf?index=true
    • http://bewebumaxof.epizy.com/79429580288.pdf
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_264e26f1a6c345e39e5e4f83df2a9551.pdf?index=true
    • http://wadoromutisagar.myartsonline.com/solved_problems_on_amplitude_modulation.pdf
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_8a686e9adf11431f89842aff79deb076.pdf?index=true
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_8e200110b8f346cca00a13f186510005.pdf?index=true
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_d875a06542fe4044b57925707be7b488.pdf?index=true
    • http://livajurusurex.epizy.com/color_green_worksheets_for_preschool.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_off0000e493.bin
8327b14ca821ca8aafdac49ccbf4773066b6e09ac395e7f13ace14b49a7c2e89
pdf-font-stream PDF embedded font (sfnt) at offset 0xE493 5256 bytes
font_01_sfnt_off0000f69e.bin
7b20642259c9e7206245dc21b9137f94a5370a4f8551bdbc1de59e3de183427b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF69E 10224 bytes