Malicious PDF — malware analysis report

Static analysis result for SHA-256 553e3c512a0441b8…

MALICIOUS

PDF

135.0 KB Created: 2021-04-20 21:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dc1f4d3ac1c102dab7f07c94f574970 SHA-1: 6af4261f323ebeaa5643766626eb466cd42dbd10 SHA-256: 553e3c512a0441b85d36426d457944761c34534b468c1d4351866b81328f65a8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary focus on directing users to a suspicious URL. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search results or distribute malicious content. The presence of the URL 'https://ponafet.ru/strik?utm_term=ocarina+of+time+great+fairy+of+courage' strongly suggests a phishing or scam attempt, disguised with a seemingly innocuous search term.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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/strik?utm_term=ocarina+of+time+great+fairy+of+courage
    • https://damanula.weebly.com/uploads/1/3/1/8/131856109/1982862.pdf
    • https://kazumole.weebly.com/uploads/1/3/1/4/131454435/funibutilivix-gerap-mezevup-xusinil.pdf
    • https://soxuwewoduxewu.weebly.com/uploads/1/3/4/0/134042667/add92d49530.pdf
    • https://jenisevemib.weebly.com/uploads/1/3/1/0/131070602/7caea855.pdf
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/eede1c7ccd15a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d2dfa290-817f-4efc-a83c-a222e5544ac7.filesusr.com/ugd/954c8b_6a4ea6cd4b344b07b64e3deb139d2ded.pdf?index=true
    • https://s3.amazonaws.com/jenagubadopi/bawolubonixixo.pdf
    • https://s3.amazonaws.com/bagisi/garment_quarter_size_guide.pdf
    • https://s3.amazonaws.com/wixanarer/52314075392.pdf
    • https://c1ab63b4-4781-4901-abeb-f581ed41d26f.filesusr.com/ugd/b44917_72415256aa224506a75e09b15e0e88e2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/60a75fa2-0f84-46b1-b5f4-d05a207b3a91/furug.pdf
    • https://uploads.strikinglycdn.com/files/9d89e978-9714-4e97-8021-7476403d1ca2/53534769564.pdf
    • http://kevuwibevuvibor.epizy.com/air_force_storekeeper_question_paper.pdf
    • https://s3.amazonaws.com/minegikukovel/spanish_to_english_learning_worksheets.pdf
    • https://s3.amazonaws.com/vovopafubipu/ximatojesurozilezago.pdf
    • http://novoboninixeme.epizy.com/13827404685.pdf
    • https://uploads.strikinglycdn.com/files/1daf8656-945a-4e91-8ef2-855d40f04a22/how_to_find_a_photo_url.pdf
    • http://dufedowukej.rf.gd/bicycle_frame_design_calculations.pdf
    • https://s3.amazonaws.com/jifedefujodu/pavewonozolur.pdf
    • http://jatomije.rf.gd/search_excel_spreadsheet_ipad.pdf
    • https://s3.amazonaws.com/tupofelasujewas/solving_rational_inequality_examples_with_answers.pdf
    • https://s3.amazonaws.com/fewunadupop/zumigu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001980b.bin
57aa4dff1c4272b6a71f3a01dbb50f00d3776e689c4cdf7b26fb80a88204bb73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1980B 14456 bytes
font_01_sfnt_off0001c6ba.bin
8365337cbb7cf6487c31e5de4f6bc732c3816b02b808d41040cc8aa3f2eddfd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6BA 5004 bytes
font_02_sfnt_off0001d7ad.bin
e42cc1119a81b85660c0cd21111cf331418bb1fd2e0c0a8b0bac3b709e96a7af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7AD 11604 bytes
font_03_sfnt_off0001fefe.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FEFE 4324 bytes

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