Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5a5c71350de6e7…

MALICIOUS

PDF

74.3 KB Created: 2021-03-12 11:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2f4af4eb2dfdcca751dcbe34f552d69c SHA-1: 83833c801cae676dcf44f9a05f941abb0c1d73c4 SHA-256: fc5a5c71350de6e70d17a5c87cc49ecd08626e840e68fa7580db9e95150af677
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, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of a malicious URL and the document's deceptive content suggest it's designed to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=dark+souls+talisman+upgrade In PDF document text
    • http://rodisawikikofu.medianewsonline.com/wexopituzipuwajivuguj.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/gijghcL/residual_income_model.pdfIn PDF document text
    • http://whitecheat.xyz/snt-_tc-_1a_2011_editionf680w.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/77815404945.pdfIn PDF document text
    • http://sellforce.ru/zefasiletobexuwinataliqg1c.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/9hjjjii/manenowi.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/iidjio2/98818620135.pdfIn PDF document text
    • https://cdn.sqhk.co/govibabika/dhc2pxo/death_worm_egg_ice_and_fire.pdfIn PDF document text
    • https://cdn.sqhk.co/titesojijuko/azcjiia/cat_physics_break_free.pdfIn PDF document text
    • http://podipotekoi.ru/samsung_un55d6000_remote_codeki73d.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/voxiwavolebifi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jadere/mixed_tenses_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/gipovazegupapozumit.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/31003155575.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/balefugotonakesevat.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/zoxudilelegidolunovumuve.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/how_do_you_use_place_value_to_multiply.pdfIn PDF document text
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_2b8ea2835fb24019865ca59339cde21d.pdf?index=trueIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_5e11b9f21a104305b1927e2754c806a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/damage_report_form_doc.pdfIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_80a518cf8428423f875d84dcfc793608.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EE 5224 bytes
SHA-256: 058e112d40a62bbb77e8bc7d5a42b96fcad2ddda2fdd2b5c851d5f5c561ae7da
font_01_sfnt_off0000e99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 10612 bytes
SHA-256: 9b1fd5a0ca772cdef1f77772785d16e0b4b49ea91be5e8ff769a8f98d7549d2a
font_02_sfnt_off00010df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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