Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbb1854320e303d…

MALICIOUS

PDF

299.5 KB Created: 2021-03-15 06:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 399c55810e71c069c097ebbde910fafa SHA-1: 1017399ca97d767adaf1369afe551edb2e25997a SHA-256: 7bbb1854320e303da9b7cac7079b3ef8d4ed9c4230d3b5f23e5760392ecf17fd
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and heuristic firings indicating it is a phishing or malware delivery attempt. The 'SE_INVOICE_LURE' heuristic suggests a deceptive lure, and the presence of an external URI points to a potential download or redirection. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving a PDF-specific exploit or obfuscated JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9720

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://mezovuduw.ru/strik?utm_term=the+negotiable+instruments+act+1881+section+4+covers PDF link annotation
    • http://bitjoms.xyz/golden_song_lyricsy4212.pdfIn PDF document text
    • http://world-wild-shop.com/what_is_the_importance_of_mapp_v_ohiod3392.pdfIn PDF document text
    • http://ita-bio.space/sopizunibodis1n92g.pdfIn PDF document text
    • http://snapchat-alert.com/concrete_truck_spec_sheet6la7u.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://uploads.strikinglycdn.com/files/c303d799-8272-4bed-855e-151b182779e9/vilutifazufupibulimawo.pdfIn PDF document text
    • http://kexofiz.epizy.com/naan_bread_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/16753407304.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/block_area_code_and_prefix_android.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/64392689988.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/26603333967.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/86268950547.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/casterton_college_rutland_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/foberugoguvavazuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3d060f-64cc-43d4-ba25-231fc2afa3eb/sexopefazetonesufud.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/how_to_become_caregiver.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/north_east_iceland_travel_guide.pdfIn PDF document text
    • http://todizugofufufax.epizy.com/what_does_final_fantasy_xv_royal_edition_include.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/97144129630.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004556a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4556A 5580 bytes
SHA-256: 993ef5a3414417a399554dc1a5dee82982db840650ef84fa5f50f4f5fcb9a1bb
font_01_sfnt_off00046839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46839 11492 bytes
SHA-256: 369c90de3a0eb2e5c9a0fa84d9cf5aa88cc0447411a468932eee4dc0d1ee68f0
font_02_sfnt_off00048f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F65 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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