Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e14e70d96a8a77b…

MALICIOUS

PDF

78.5 KB Created: 2021-02-24 18:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 92bf482bb1018c53ed9c5e59c9f30c82 SHA-1: 2f1a7ab8843d9922984a6146b7c583925b33e864 SHA-256: 1e14e70d96a8a77bdd3391c8e14bd42d0917bf36e1c7b2f4896b2aff6c5e568d
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or trojan distribution role.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=%25C2%25BFqu%25C3%25A9+es+escabiosis+y+porque+se+produce In PDF document text
    • https://semogabetik.weebly.com/uploads/1/3/1/4/131482882/wejawato.pdfIn PDF document text
    • https://gilawidukawopux.weebly.com/uploads/1/3/2/7/132741225/8470959.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/Peifz7z/mobile_legends_adventure_codes_september_2020.pdfIn PDF document text
    • http://wobepatonogez.iblogger.org/47252698481.pdfIn PDF document text
    • https://fuwiwidiwijidex.weebly.com/uploads/1/3/1/6/131637339/1316052.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/B5jbdZc/33975918118.pdfIn PDF document text
    • http://vehicleinsusa.com/38928892344as6qe.pdfIn PDF document text
    • https://cdn.sqhk.co/dikarulik/jcTjbih/26592470320.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/hhehejc/kemefapoleluja.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/ULan8M4/41093771821.pdfIn PDF document text
    • https://cdn.sqhk.co/peposusuwi/jchadgj/n7player_music_player_pro_apk.pdfIn PDF document text
    • http://kefets.xyz/losatogujozutuboxukozuljic25.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/iiggjiO/xxbt2ixx_sticker_wallet.pdfIn PDF document text
    • http://varnisvakq.ru/sharon_rogers_future_fight_uniformy701v.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
    • http://roparewuna.rf.gd/bronze_medallion_examiner_sheet.pdfIn PDF document text
    • http://jeloneliva.epizy.com/83709794956.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_off0000e5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AD 5280 bytes
SHA-256: 7d3f77074a30928e3d6a1a1dc2185f7dbb8dea9c62dfe95ece91a3bf78f57dac
font_01_sfnt_off0000f753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF753 11504 bytes
SHA-256: 6e702a7229125559b0a19a5eaf89d5e10ece20a7b2cead36b3fd1110117cf63d
font_02_sfnt_off00011c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C98 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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