Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d947a0f9282335a…

MALICIOUS

PDF

79.5 KB Created: 2021-04-06 20:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93d1f58a3ee8d3d3573301d00702572f SHA-1: 77d0019fc5a5a3fca1548b231bf5b685b112f3f3 SHA-256: 1d947a0f9282335af73e4ddd05c5a6a7b6f3ecb631d570814bdd73d139faa1be
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://ponafet.ru/strik?utm_term=will+there+be+another+diary+of+wimpy+kid+movie', suggests a phishing or scam attempt. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', reinforcing the malicious nature. No scripts were extracted, but the overall structure and URL reputation point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=will+there+be+another+diary+of+wimpy+kid+movie
    • https://nejavolezi.weebly.com/uploads/1/3/4/0/134017816/lorixejatologegon.pdf
    • https://lewebivaduxug.weebly.com/uploads/1/3/5/3/135392118/kojakawoxupora_tuwakajuzamok_zulijikozasax_fozomososukogi.pdf
    • https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/beriwex.pdf
    • https://rokipidofavum.weebly.com/uploads/1/3/4/0/134042790/xotul_saridunuxonoruw_jitazobakogizu_lonuzokovited.pdf
    • http://betijeduw.getenjoyment.net/1127324839.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/numegubowalonan/cooking_for_geeks.pdf
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_7b55815d1a0647618d3f5ee77bb2e4f9.pdf?index=true
    • https://s3.amazonaws.com/falejogajir/preterito_pluscuamperfecto_de_subjuntivo_ejercicios.pdf
    • https://s3.amazonaws.com/pevuwarobuvowa/57445150507.pdf
    • https://s3.amazonaws.com/zamemigojat/convergence_training_test_answers.pdf
    • https://s3.amazonaws.com/dapekufoxiraku/iso_27001_external_audit_report.pdf
    • https://uploads.strikinglycdn.com/files/6827569a-7b71-480a-a8bd-15c33594d93d/pride_and_prejudice_2005_watch_free_online.pdf
    • https://7054f9d6-44ea-4b6c-8535-0d04e7cb9957.filesusr.com/ugd/963b03_693fd7f232f543febb2110415d20e036.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3495a6a4-ed39-4cd0-a285-8b85fcfd29d4/hamilton_beach_digital_steamer_recipes.pdf
    • http://limufij.myartsonline.com/zamubobabejurekizibuda.pdf
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_783883ef5c7a4e7ba459effb726f07f7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/201e61ea-d2d6-435e-8286-73f25f5cb6bb/love_story_music_notes_piano.pdf
    • https://uploads.strikinglycdn.com/files/a6702b6a-aaf1-43da-8d80-1cbfe4b59ef0/how_to_reset_pioneer_avh-4100nex.pdf
    • https://677e6977-fc43-48b2-ac81-16e478c8573b.filesusr.com/ugd/3750c2_fb0912e9de3e45eca1843cc5c8f849bb.pdf?index=true
    • https://s3.amazonaws.com/wonumafubij/fujajenopazukonukapodug.pdf
    • https://s3.amazonaws.com/wupixufekijax/74313960652.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_off0000fa02.bin
c8a21fb90b0107b69d07f32c43422ec0d994057d8ac01abf51a5c92426281f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 5572 bytes
font_01_sfnt_off00010ce5.bin
db8dffda26818d899318ab3b1b9fd4046df57aee659772c19b66534e5e92b9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE5 10360 bytes

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