Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2e2e8cd5881862…

MALICIOUS

PDF

113.2 KB Created: 2021-03-31 23:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73feeadbd2e59f2a3568127e6f4d05c6 SHA-1: 76ee44c1d067ebe031a645e0d37f47255b3ca525 SHA-256: fe2e2e8cd588186275c944822b7176b73c819bbe6e95689d0a76a4903768c7d5
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is part of a link farm, with numerous external URLs pointing to other PDF documents. One of the primary URLs, 'https://lozipotod.ru/award?keyword=list+of+opposite+words+pdf+in+malayalam', suggests a lure to disguise the malicious intent. While no scripts were directly extracted, the PDF structure and the presence of external links are indicative of a phishing or content-farming attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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.
  • 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://lozipotod.ru/award?keyword=list+of+opposite+words+pdf+in+malayalam
    • https://cdn-cms.f-static.net/uploads/4454559/normal_605f0b8fd17a2.pdf
    • https://cdn-cms.f-static.net/uploads/4408188/normal_601dbc703f579.pdf
    • https://static.s123-cdn-static.com/uploads/4403533/normal_5fe4dd9cc40e7.pdf
    • https://cdn-cms.f-static.net/uploads/4407070/normal_604b17fadf146.pdf
    • https://cdn-cms.f-static.net/uploads/4505699/normal_602317b28e22d.pdf
    • https://cdn-cms.f-static.net/uploads/4476274/normal_601180e0a87a0.pdf
    • https://static.s123-cdn-static.com/uploads/4482671/normal_5fc8b541a9b4c.pdf
    • https://cdn-cms.f-static.net/uploads/4527237/normal_603c74ae42aac.pdf
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4461694d-a6f7-4a69-895a-ff5ddeb3c622.filesusr.com/ugd/f504fb_3df80d9e230f452db3b810fc536096e2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a5a3c8fb-4eee-4b5b-96f0-045427b7bcd8/dyson_cyclone_v10_animal_cordless_vacuum_cleaner.pdf
    • https://s3.amazonaws.com/saxefi/72997565354.pdf
    • https://uploads.strikinglycdn.com/files/6fe11c7e-79b1-4c9b-ba3c-adb19099d3ce/bijekajevofumapijixan.pdf
    • https://uploads.strikinglycdn.com/files/5ed3ec6d-e688-46bd-8f2b-4ba7f317a485/pawubakifolupesiruvezip.pdf
    • https://uploads.strikinglycdn.com/files/14a9ab7d-84d8-4ff6-b3d5-7df2c9c4f039/pafuleviminepi.pdf
    • https://uploads.strikinglycdn.com/files/2f3f9cba-b61a-4302-a695-8ec1bfc1485f/80224906940.pdf
    • https://uploads.strikinglycdn.com/files/0c109367-94ce-4fbe-bf4b-f20e10bec3c4/can_you_answer_phone_calls_on_a_smartwatch.pdf
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_134a3391c62a43a9857fb70cfa4ad2ca.pdf?index=true
    • https://s3.amazonaws.com/xidulumexi/csgo_aimbot_2018.pdf
    • https://s3.amazonaws.com/luropiw/bofozawixibizugefexuru.pdf
    • https://s3.amazonaws.com/fisulefajow/video_er_for_facebook_apk_pro.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/
    • https://gitlab.com/smc/meera/blob/master/COPYING
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001134b.bin
9eee3bcdf4c1584dd23da093b121eda0b3a7399f2cdde440f9a6ab7868b7eb2a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1134B 39908 bytes
font_00_sfnt_off00010135.bin
6d18bfcf04127a3198974a992186c918140f37c5079171678edecc23c0b3825e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10135 5324 bytes
font_02_sfnt_off00017f18.bin
0b72ae062574c6d9788c513b8163e616356b4efc849bc01edfacb2a68619bcc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F18 9392 bytes
font_03_sfnt_off00019f6f.bin
c5b81f703ebddc697e6824868dcd306aba919aa4c1ec28f594a83a04df97872b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19F6F 16144 bytes

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