Malicious PDF — malware analysis report

Static analysis result for SHA-256 14dc62e842a04f10…

MALICIOUS

PDF

79.0 KB Created: 2021-02-23 20:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8127cc644007c5baca090c5fdeb7860a SHA-1: 286a75ec9b55318b9ba7d4d27c694c66af2d68e4 SHA-256: 14dc62e842a04f1033dbacb49cf888fd375aad90465e8cc34bd7dbdc26b62fa1
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The embedded URLs and the document's structure strongly suggest it is designed to redirect users to potentially harmful websites.

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
  • 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.
  • 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://jottigo.ru/strik?utm_term=manchas+vermelhas+na+pele+que+n%25C3%25A3o+co%25C3%25A7am+no+bra%25C3%25A7o PDF link annotation
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/9065373.pdfIn PDF document text
    • https://towavakivuno.weebly.com/uploads/1/3/5/3/135318123/8c38b250ea5fb.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/76739f2e27071.pdfIn PDF document text
    • http://idealica-italiaofficial.site/tap_titans_2_artifacts_max_levelazvsd.pdfIn PDF document text
    • http://webmastervlad.ru/belebidusufutilanwjvon.pdfIn PDF document text
    • https://nawajutexi.weebly.com/uploads/1/3/4/1/134108687/7997665.pdfIn PDF document text
    • http://adanakebap.org/wewiditedirakinitexotimztf4x.pdfIn PDF document text
    • https://nakojuxipesasam.weebly.com/uploads/1/3/0/7/130776326/f79195.pdfIn PDF document text
    • http://trynutra.shop/1073418579fv306.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/fYgdhjr/medusa_kampf_der_titanen_2010.pdfIn PDF document text
    • http://sollabs.xyz/acer_laptop_battery_reset_button5wfo1.pdfIn PDF document text
    • http://cenderaoriginator.com/67168791191n5ejl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sesijesule/continuous_wavelet_transform.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/genesis_robert_alter_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/91827560775.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_off0000f289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 6004 bytes
SHA-256: 4d0d3ff26dc405a0b11c002a4e70c19e8e0e3582db48e2800d5be2c08a83f875
font_01_sfnt_off00010608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10608 12720 bytes
SHA-256: 73e560736d698f173087b9c2b2b81a95ba97837bcb8312f6391a3fc0e14994e3

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