Malicious PDF — malware analysis report

Static analysis result for SHA-256 82770bda57fc57d8…

MALICIOUS

PDF

73.5 KB Created: 2021-01-21 05:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d33a9ddcac2d2293a9346954cd393c18 SHA-1: 674749986d7192fb228453450f1441e2aa6c1e16 SHA-256: 82770bda57fc57d84b57333b63c4bbfb037e8bbe6a2339dac65115782ccc0ef6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a search query. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URL suggest it's designed to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://crophysi.ru/wb?keyword=laval%20guide%20events%20map%20weatherford%20texas In PDF document text
    • https://site-1175554.mozfiles.com/files/1175554/okc_thunder_rumors.pdfIn PDF document text
    • https://site-1173426.mozfiles.com/files/1173426/spiralizer_zucchini_pasta_recipe.pdfIn PDF document text
    • https://site-1176587.mozfiles.com/files/1176587/tap_tap_builder_mod_apk_unlimited_all.pdfIn PDF document text
    • https://site-1168374.mozfiles.com/files/1168374/lamodowexabikixop.pdfIn PDF document text
    • https://site-1232858.mozfiles.com/files/1232858/mofomudoka.pdfIn PDF document text
    • https://site-1171371.mozfiles.com/files/1171371/fanetegegazareke.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/icj1Pjj/99100901620.pdfIn PDF document text
    • https://site-1245124.mozfiles.com/files/1245124/angry_birds_in_tamil_free.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/heiejiP/the_lighthouse_review_ign.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/XCaS7sQ/monster_shooter_arcade_game.pdfIn PDF document text
    • https://site-1178876.mozfiles.com/files/1178876/vogubefamub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sakigekoxigukil.epizy.com/rafisolabowolafel.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/gepidexujosapujotugazag.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/crohn_s_disease_acg_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/bakewibivetoda.pdfIn PDF document text
    • http://fasilew.epizy.com/excel_macro_to_duplicate_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/98107982974.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/bakide.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/best_secret_folder_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/45385102103.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18D 5616 bytes
SHA-256: 019f97655ff2b2d94e7f436ed92f91dc9d1d83922bc793e4babe924fb713eb9e
font_01_sfnt_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 10644 bytes
SHA-256: 1fef7062307b2f3dcc94bf76a75cacec6b3fc23d0f92d87173a89024a92ea6a2

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