Malicious PDF — malware analysis report

Static analysis result for SHA-256 782737f9f69d1ebe…

MALICIOUS

PDF

59.7 KB Created: 2020-08-08 22:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e91435fa6591a34c0857e8c0df5617 SHA-1: b95c7c7c410de8516f0a26ad86777a303778b36e SHA-256: 782737f9f69d1ebee28d38a30b8d3ee07560656f21c937a9155bd3c075cc0158
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as 'Bsc 2nd sem chemistry notes pdf download' that redirects to a malicious URL. This URL is part of a link farm, suggesting an attempt to distribute malware or phish for credentials. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.com/pify?keyword=bsc+2nd+sem+chemistry+notes+pdf+download
    • http://files.jitsbottles.com/uploads/1/3/0/9/130969053/rewerowim.pdf
    • http://nuniv.charlestonteacheralliance.com/uploads/1/3/1/3/131381464/waxap-kunexofupubuke-kuliterejajuvem.pdf
    • http://files.redhawkcommunity.com/uploads/1/3/0/9/130969573/mibevokaxejar_wowabulopabib_xiseriz.pdf
    • http://files.tamiwoodcreations.com/uploads/1/3/1/4/131407423/6381724.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/63239118135.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/66669268650.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/76729942531.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/39342002222.pdf
    • https://cdn.shopify.com/s/files/1/0431/7075/8820/files/18521876179.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/audi_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/79921333735.pdf
    • https://cdn.shopify.com/s/files/1/0437/0546/7035/files/fagatexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3622/files/adverbs_worksheet_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2876/files/b._com_part_2_notes_all_subjects.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/7549680089.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/kilolovisusidibakevidur.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f39.bin
b4f0f3897723e1a7c797aa9baf0ba2cc4c8736582a50db37431c6429fdf443f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F39 5556 bytes
font_01_sfnt_off000081fb.bin
55635b50bad29c6b04cd9b4d5dd064b78be6c29eafc981c666da6fe4470a6799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81FB 3204 bytes
font_02_sfnt_off00008eeb.bin
6979bd47582e1076a00d5472c1190b3af330e4342ab9b9f0dc7d58f6ae02f5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEB 2576 bytes
font_03_sfnt_off000099de.bin
f303a38860ba0a29d527b58b03feab0648b9d7af92bb027082a0586c31efffbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99DE 10252 bytes
font_04_sfnt_off0000bce0.bin
4362e686776cae9b5e877a8e5de4a1ff5ae9966626bcf1046762b8e3a01bbea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE0 16224 bytes
font_05_sfnt_off0000d22d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD22D 4324 bytes

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