Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05e8167c424e730…

MALICIOUS

PDF

77.6 KB Created: 2021-03-26 10:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca6fd16a24b351d19ad177efbbc41965 SHA-1: db012d35c2541d83275c0a4318ef736e477cb3f4 SHA-256: f05e8167c424e730b009a9ae8ac68a5934d5781d7ac1e75ac23acfc93aa92298
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://ponafet.ru/wix?keyword=dls+16+apkhome', is flagged as unknown reputation, suggesting a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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
  • 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://ponafet.ru/wix?keyword=dls+16+apkhome
    • http://kikababono.mywebcommunity.org/39951358694.pdf
    • https://cdn.sqhk.co/rilowikapaz/yJibjfz/evil_nun_scary_horror_game_adventure.pdf
    • http://jixazepo.mywebcommunity.org/rapabuvozunugovudirupup.pdf
    • http://nokojatagi.mywebcommunity.org/how_to_change_time_on_a_lacrosse_clock.pdf
    • http://rezanufeku.mygamesonline.org/monurigupibi.pdf
    • http://munasimowijuxi.getenjoyment.net/where_can_i_listen_to_the_harry_potter_books_for_free.pdf
    • https://cdn.sqhk.co/butemobe/t6siaUU/space_jam_2_release_date_cast.pdf
    • http://bunagutafa.getenjoyment.net/abscess_pathophysiology.pdf
    • http://ravigimojamel.mypressonline.com/como_ler_hemograma_de_cachorro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_e9c46de376c9475a8a2d09eaa0eb4bb2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f1627a19-f11f-4907-945a-69f492e7b5b6/one_call_away_lyrics_with_piano_chords.pdf
    • https://uploads.strikinglycdn.com/files/240861c4-2293-460b-97f1-33b85ab65b14/honda_rebel_300_top_speed_km_h.pdf
    • https://uploads.strikinglycdn.com/files/6173b22a-bff2-4615-9868-1a603b7cd579/why_is_the_adventures_of_tom_sawyer_banned.pdf
    • https://uploads.strikinglycdn.com/files/181a51d0-6273-4a8f-96b7-18c5b5377cd0/68898255774.pdf
    • https://uploads.strikinglycdn.com/files/b415cea3-67bc-4149-b6f6-5210102cf849/excel_2013_exercises.pdf
    • https://uploads.strikinglycdn.com/files/ac71df8e-1ab6-4737-a2eb-22bd5c441865/47679990364.pdf
    • https://uploads.strikinglycdn.com/files/b9c19fe6-9f15-487c-ac30-517cd772c945/28435752622.pdf
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_d925f40bede44ed68c8fa3808a5a1834.pdf?index=true
    • http://birukuf.onlinewebshop.net/sumija.pdf
    • https://uploads.strikinglycdn.com/files/2b643f07-f42d-4b27-91c5-f84a492efb56/78411389840.pdf
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_5e6e020f6e8c4c9ebaf3e815599abea1.pdf?index=true
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_6182d93e5f0e4ccc9999c3d49a9f720b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/66bff8a8-53aa-4b53-9c72-5a2d0adcc9e1/selenium_webdriver_chrome_example_java.pdf
    • https://uploads.strikinglycdn.com/files/2685bbd2-9633-49a2-a0a1-cc80792301a1/levobudabavasapesiregorub.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_off0000f016.bin
3808f4a1388ae67fdbc6c84a4fb0b1de292917e3c8124f4508437d6fb0e5c159		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 5232 bytes
font_01_sfnt_off000101c4.bin
db8d3610ddb96fd84ff943519921b4200f846d3562b23f66ddab6da3b0d8cc86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101C4 12360 bytes

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