Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac9609727e78ede…

MALICIOUS

PDF

77.9 KB Created: 2021-03-15 06:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb928a877fd393a707e4101ea63a63d0 SHA-1: 164b06b122db8b280104220830e76f1b38992522 SHA-256: dac9609727e78ede6009afbdc0fe141b6e2ba27f978f0e850810d965b709d571
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external links, suggesting it is part of a link farm designed to distribute malware or phish for information. The primary malicious URL identified is https://xezojetit.ru/award?keyword=aha+bls+provider+manual+2020+pdf+free, which is likely used to serve a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xezojetit.ru/award?keyword=aha+bls+provider+manual+2020+pdf+free
    • https://niniteju.weebly.com/uploads/1/3/0/8/130814631/5767157.pdf
    • http://bandalet.club/49215792992eirou.pdf
    • http://site-shop.xyz/grade_3_maths_test_worksheets1stjp.pdf
    • http://povar2020.site/how_to_use_staedtler_calligraphy_markers7827a.pdf
    • https://zazoveju.weebly.com/uploads/1/3/1/4/131407355/8413316.pdf
    • http://help-feedback-amzn3.xyz/goxekeufm6v.pdf
    • https://kuzapulekoxiror.weebly.com/uploads/1/3/2/6/132681507/21607.pdf
    • http://aycotoro5.xyz/can_you_put_chia_seeds_in_smoothiesrmp5j.pdf
    • http://retapadu.medianewsonline.com/is_jump_force_on_xbox_one.pdf
    • http://wordsideget.top/wizobumizurirurisokukunegbro0v.pdf
    • https://jefamiwufilidiv.weebly.com/uploads/1/3/1/4/131409158/5296381.pdf
    • http://tevfikyuce.xyz/what_foods_can_a_lacto_ovo_vegetarians_not_eat0r6wy.pdf
    • http://coins24h.com/how_to_type_cubed_in_google_docsadicc.pdf
    • http://powajaxib.medianewsonline.com/84979080236.pdf
    • http://hihikane.space/how_to_do_an_interview_presentation_on_teamsfye2z.pdf
    • https://tiparopodewab.weebly.com/uploads/1/3/5/3/135340776/gemewuwezotepe.pdf
    • http://goldotzyv.ru/22420106142vok6u.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6cb5fe40-d65e-419d-b55f-5986099fe734/zisomepulikibol.pdf
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_e7d4ac53d16e4961b03c036bafeb8b59.pdf?index=true
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_174b0bc1122e430b8c9239ff8a95ae37.pdf?index=true
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_0aec7d747dae4e91984e40a568c02131.pdf?index=true
    • http://gosaduzunake.myartsonline.com/how_to_find_the_fgx.pdf
    • https://uploads.strikinglycdn.com/files/5d934410-9ce6-460a-a208-3ed9573fb554/dewalt_dw718_replacement_motor.pdf
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_52332ff83cc4427091f6eae9e33a238d.pdf?index=true
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_e408bba51965447387fbd566d8b4b3b6.pdf?index=true
    • 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_off0000ef4a.bin
6d595cd08636e38372cf5cee1b3258783707e54b062e46171af5ef424a49194b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4A 5744 bytes
font_01_sfnt_off000102ac.bin
00f3f49017b93faec7c1670cb49fc52b81019a91082dcd30645302a601fcb8c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC 11356 bytes

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