Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b80400759ca2d57…

MALICIOUS

PDF

73.3 KB Created: 2020-09-07 23:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6884a3750655438dc74b1de7139f9984 SHA-1: 7c4a995c1d53bf1e81e40a070637862327414171 SHA-256: 6b80400759ca2d5758fc55ee1fbb3c7278938a8b1db86bc54cd53da21ef754ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically a URL related to a 'bangla language keyboard free' lure. It also exhibits characteristics of a PDF link farm, with numerous external links. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.link/wix?keyword=bangla+language+keyboard+free In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7930/3317/files/nalonekinibex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/10399023489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/dagixejakaripigajena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/adda_247_puzzle_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/xipixelawukalok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/chemistry_compound_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2868/3674/files/pizzaiolo_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/nufom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9597/3271/files/steam_link_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/7688/0293/files/abelardo_castillo_hernan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8113/8343/files/32316409392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/ccleaner_professional_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7663/9134/files/domalubizulugutuxufufod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4023/3880/files/spm_essay_report_about_environment.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 12

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5494 5252 bytes
SHA-256: 0052880acb57a640fd9e4dde8384d871a3bcd1e9e1439444d838efd1600ea2de
font_01_sfnt_off0000668c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668C 2656 bytes
SHA-256: 1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178
font_02_sfnt_off00007191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7191 5920 bytes
SHA-256: 17687fbd1dd65277f1cdef9ee58d1e3c73c94f5805fabc9fbb08dba459d74f1d
font_03_sfnt_off000084d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D7 3048 bytes
SHA-256: e23308bb06bff427f4fe2d795198e016b2e9db23d45fd702446b15ef1a1323d1
font_04_sfnt_off000090e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E3 2328 bytes
SHA-256: 6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
font_05_sfnt_off00009b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9B 2604 bytes
SHA-256: d4cda5a9ecb2558448f754249352cd4d73a8f7efff03060ee9a54ebf713292d1
font_06_sfnt_off0000a6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B1 2108 bytes
SHA-256: b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
font_07_sfnt_off0000b085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB085 4336 bytes
SHA-256: 87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284
font_08_sfnt_off0000be26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE26 10208 bytes
SHA-256: 96717d75de12d7249861e8f5e10b75a2e64bec6985b5583aeb550f99667de334
font_09_sfnt_off0000e047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE047 16364 bytes
SHA-256: b659bfc6ff5689910210d50de8847be648feb143f305910b87386f8a0cc1ff72
font_10_sfnt_off0000f694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 4320 bytes
SHA-256: 04bdd852e9d853e33411507de75437d22869e65f920ed08d23eb310d58e577f3
font_11_sfnt_off00010704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10704 2608 bytes
SHA-256: d404f64416bf1ff5ad76d6d0ab30c7620aa9735638cfece5436aad8d6ad80edc

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